Fix tests for pt-duplicate-key-checker

$ prove -vw --trap --timer t/pt-duplicate-key-checker/
[17:00:03] t/pt-duplicate-key-checker/basics.t ............ 
not ok 1 - Finds mysql.columns_priv PK

#   Failed test 'Finds mysql.columns_priv PK'
#   at t/pt-duplicate-key-checker/basics.t line 36.
#                   '# ########################################################################
# # mysql.columns_priv                                                      
# # ########################################################################
# 
# # PRIMARY (`Host`,`User`,`Db`,`Table_name`,`Column_name`)
# 
# # ########################################################################
# # Summary of indexes                                                      
# # ########################################################################
# 
# # Total Indexes  1
# '
#     doesn't match '(?^:PRIMARY \(`Host`,`Db`,`User`,`Table_name`,`Column_name`\))'
ok 2 - No dupes on clean sandbox
not ok 3 - Default output

#   Failed test 'Default output'
#   at t/pt-duplicate-key-checker/basics.t line 48.
not ok 4 - --nosql

#   Failed test '--nosql'
#   at t/pt-duplicate-key-checker/basics.t line 55.
not ok 5 - --nosummary

#   Failed test '--nosummary'
#   at t/pt-duplicate-key-checker/basics.t line 62.
not ok 6 - Issue 306 crash on uppercase column names

#   Failed test 'Issue 306 crash on uppercase column names'
#   at t/pt-duplicate-key-checker/basics.t line 71.
ok 7 - No dupes for issue 269
ok 8 - No results for nonexistent db
not ok 9 - Bug 894140

#   Failed test 'Bug 894140'
#   at t/pt-duplicate-key-checker/basics.t line 101.
ok 10 - --key-types k
ok 11 - --key-types f
ok 12 - --key-types fk (explicit)
not ok 13 - Exact unique dupes (bug 1217013)

#   Failed test 'Exact unique dupes (bug 1217013)'
#   at t/pt-duplicate-key-checker/basics.t line 147.
# 15c15
# < #	  `domain` varchar(175) character set utf8mb3 collate utf8mb3_bin not null
# ---
# > #	  `domain` varchar(175) character set utf8 collate utf8_bin not null
not ok 14 - --verbose option doesn't skip dupes reporting (bug 1402730)

#   Failed test '--verbose option doesn't skip dupes reporting (bug 1402730)'
#   at t/pt-duplicate-key-checker/basics.t line 160.
# 15c15
# < #	  `domain` varchar(175) character set utf8mb3 collate utf8mb3_bin not null
# ---
# > #	  `domain` varchar(175) character set utf8 collate utf8_bin not null
ok 15 - Sandbox servers
1..15
# Looks like you failed 8 tests of 15.
Dubious, test returned 8 (wstat 2048, 0x800)
Failed 8/15 subtests 
[17:00:10] t/pt-duplicate-key-checker/clustered_keys.t .... 
not ok 1 - Shorten, not remove, clustered dupes

#   Failed test 'Shorten, not remove, clustered dupes'
#   at t/pt-duplicate-key-checker/clustered_keys.t line 40.
# 10,11c10,11
# < #	  `b` int not null
# < #	  `a` int not null
# ---
# > #	  `b` int(11) not null
# > #	  `a` int(11) not null
ok 2 - PTDEBUG doesn't auto-vivify cluster key hashref (bug 1036804)
ok 3 - fk_chosen_index_bug_1201443
ok 4 - Sandbox servers
1..4
# Looks like you failed 1 test of 4.
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/4 subtests 
[17:00:19] t/pt-duplicate-key-checker/issue_1192.t ........ 
1..2
not ok 1 - Keys are sorted lc so left-prefix magic works (issue 1192)

#   Failed test 'Keys are sorted lc so left-prefix magic works (issue 1192)'
#   at t/pt-duplicate-key-checker/issue_1192.t line 41.
ok 2 - Sandbox servers
# Looks like you failed 1 test of 2.
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/2 subtests 
[17:00:22] t/pt-duplicate-key-checker/issue_298.t ......... 
1..2
ok 1 - Does not crash on undef var
ok 2 - Sandbox servers
ok     4090 ms ( 0.00 usr  0.00 sys +  1.36 cusr  0.82 csys =  2.18 CPU)
[17:00:27] t/pt-duplicate-key-checker/issue_331.t ......... 
1..2
not ok 1 - Issue 331 crash on fks

#   Failed test 'Issue 331 crash on fks'
#   at t/pt-duplicate-key-checker/issue_331.t line 44.
# 10c10
# < #	  `id` bigint not null default '0'
# ---
# > #	  `id` bigint(20) not null default '0'
ok 2 - Sandbox servers
# Looks like you failed 1 test of 2.
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/2 subtests 
[17:00:31] t/pt-duplicate-key-checker/issue_663.t ......... 
1..2
ok 1 - Prints dupe key with prefixed column (issue 663)
ok 2 - Sandbox servers
ok     4099 ms ( 0.00 usr  0.00 sys +  1.40 cusr  0.79 csys =  2.19 CPU)
[17:00:35] t/pt-duplicate-key-checker/standard_options.t .. 
1..1
ok 1 - Dies if PID file already exists (issue 391)
ok     1005 ms ( 0.01 usr  0.00 sys +  0.80 cusr  0.17 csys =  0.98 CPU)
[17:00:36]

Test Summary Report
-------------------
t/pt-duplicate-key-checker/basics.t          (Wstat: 2048 Tests: 15 Failed: 8)
  Failed tests:  1, 3-6, 9, 13-14
  Non-zero exit status: 8
t/pt-duplicate-key-checker/clustered_keys.t  (Wstat: 256 Tests: 4 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
t/pt-duplicate-key-checker/issue_1192.t      (Wstat: 256 Tests: 2 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
t/pt-duplicate-key-checker/issue_331.t       (Wstat: 256 Tests: 2 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
Files=7, Tests=28, 33 wallclock secs ( 0.09 usr  0.04 sys + 10.02 cusr  5.95 csys = 16.10 CPU)
Result: FAIL