modify RAM sizes of VM, java 6 -> 7, cloudera manager 4 -> 5


Former-commit-id: 89d1a34b6707e14705ecad9fb563512fb3fbe3d0
fix JAVA_HOME entry in bashrc


Former-commit-id: 1cc60781d901813b02eae14a8c64e9006de2c9fe
remove java tarball from repo


Former-commit-id: 2121231d8551ef406ac0447a78b57e9494bb5d2e