SharedClassesCacheChecker deletes non-test related caches from default location

[Mesbah-Alam]

If default location is used for generating test specific SC caches, SharedClassesCacheChecker has the potential to delete non-test related caches as it iterates through the default location and deletes all caches it finds.

Example:

https://ci.eclipse.org/openj9/job/Test-extended.system-JDK8-win_x86-64_cmprssptrs/139/tapResults/

SCC stderr Details for Cache 5
SCC stderr 
SCC stderr Jan 17, 2019 8:22:07 AM net.openj9.sc.api.SharedClassesCacheChecker verify
SCC stderr INFO: cache name is sharedcc_LOCAL SERVICE

The only test that uses SharedClassesCacheChecker is SharedClassesAPI test. We need to update the test to invoke SharedClassesCacheChecker in such a way that, when default cacheDir is used, it only deletes the cache that the test created.

[Mesbah-Alam]

Note: SharedClassesCacheChecker is invoked per cache, so we can simply pass the cacheName to it and force it to only delete that cache-- be it from default cacheDir, or specific cacheDir.