use maven-forge-plugin to run tests, make check-short faster with pre scan

git-svn-id: http://svn.terracotta.org/svn/ehcache@7840 b9324663-ca0f-0410-8574-be9b3887307d
merge 7840 from trunk/ehcache-os 

git-svn-id: http://svn.terracotta.org/svn/ehcache@7841 b9324663-ca0f-0410-8574-be9b3887307d
Delete ehcache-2.7.3 tag to retag.

git-svn-id: http://svn.terracotta.org/svn/ehcache@7842 b9324663-ca0f-0410-8574-be9b3887307d
Tag ehcache-2.7.3 from 4.0.3-rc branch

git-svn-id: http://svn.terracotta.org/svn/ehcache@7843 b9324663-ca0f-0410-8574-be9b3887307d