RFR: 7903520 - jcov is missing versions of testing dependencies and javatest

[Jiří Vaněk]

jcov now:
 - downloads all necessary dependences, unless present
 - is setting up versions of testng and jcommander
 - is not setting version of javatest, simply gets latest tagged binary
 - gitignores build/template.xml

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Commit messages:
 - 7903520 - jcov is missing versions of testing dependencies and javatest

Changes: https://git.openjdk.org/jcov/pull/40/files
 Webrev: https://webrevs.openjdk.org/?repo=jcov&pr=40&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903520
  Stats: 34 lines in 4 files changed: 20 ins; 4 del; 10 mod
  Patch: https://git.openjdk.org/jcov/pull/40.diff
  Fetch: git fetch https://git.openjdk.org/jcov.git pull/40/head:pull/40

PR: https://git.openjdk.org/jcov/pull/40