RFR JDK-8217761: Enhance run-test-prebuilt jib profile to support running tests with JCov

Fri Jan 25 23:20:40 UTC 2019

Hi,

Please take a look on a change to allow JCov test execution through jib.

Please notice that this fix also changes behavior of RunTest.gmk when conflicting combination of options is used. JCOV_IMAGE_DIR  is now expected to be set when TEST_OPTS_JCOV is true.

Shura

Bug: https://bugs.openjdk.java.net/browse/JDK-8217761
Webrev: http://cr.openjdk.java.net/~shurailine/8217761/webrev.02/