RFR: CODETOOLS-7902995: Update/Improve jcheck settings for jtreg repo

[Jonathan Gibbons]

Update to improve jcheck settings for the jtreg repo.

Based on the equivalent file for the JDK repo.

Here, for reference, are the diffs:
    2,3c2,4
    < project=jdk
    < jbs=JDK
    ---
    > project=code-tools
    > comments=lax
    > jbs=CODETOOLS
    6c7
    < error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists
    ---
    > error=author,committer,reviewers,merge,issues,executable,symlink,message,whitespace
    9c10
    < tags=(?:jdk-(?:[1-9]([0-9]*)(?:.(?:0|[1-9][0-9]*)){0,4})(?:+(?:(?:[0-9]+))|(?:-ga)))|(?:jdk[4-9](?:u\d{1,3})?-(?:(?:b\d{2,3})|(?:ga)))|(?:hs\d\d(?:.\d{1,2})?-b\d\d)
    ---
    > tags=jtreg(?:4.1-b[0-9]{2}|5.[01]-b[0-9]{2}|6|-[6789](?:.[0-9]+)?+[0-9]+)
    17c18
    < files=.*.cpp|.*.hpp|.*.c|.*.h|.*.java|.*.cc|.*.hh|.*.m|.*.mm|.*.gmk|.*.m4|.*.ac|Makefile
    ---
    > files=.*.java|.*.m|.*.mm|.*.gmk|.*.m4|.*.ac|Makefile
    24d24
    < reviewers=1
    31,34c31
    < pattern=^([124-8][0-9]{6}): (\S.*)$
    < 
    < [checks "problemlists"]
    < dirs=test/jdk|test/langtools|test/lib-test|test/hotspot/jtreg|test/jaxp
    ---
    > pattern=^(79[0-9]{5}): (\S.*)$
    \ No newline at end of file

-------------

Commit messages:
 - add final newline
 - CODETOOLS-7902995: Update/Improve jcheck settings for jtreg repo

Changes: https://git.openjdk.java.net/jtreg/pull/18/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jtreg&pr=18&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-7902995
  Stats: 29 lines in 1 file changed: 28 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jtreg/pull/18.diff
  Fetch: git fetch https://git.openjdk.java.net/jtreg pull/18/head:pull/18

PR: https://git.openjdk.java.net/jtreg/pull/18