remove 4.3.0-rc branches in preparation of re-branching

git-svn-id: http://svn.terracotta.org/svn/ehcache@9502 b9324663-ca0f-0410-8574-be9b3887307d
TABINF-3974: re-create branch for 4.3.0-rc build

git-svn-id: http://svn.terracotta.org/svn/ehcache@9503 b9324663-ca0f-0410-8574-be9b3887307d
Tag ehcache-2.10.0.0.6 from 4.3.0-rc branch

git-svn-id: http://svn.terracotta.org/svn/ehcache@9504 b9324663-ca0f-0410-8574-be9b3887307d