Revert "try ulimit"

This reverts commit 41cf453bbdbdb2cbf5693c7ecf7794f61edfc2c7.
Revert "downgrade to jdk 1.7"

This reverts commit 0cd8dd1fff57cf0fa5118cc708ac76ba4f01fb72.
Revert "downgrade api use for jdk 1.7"

This reverts commit 5fb81926e336c846ddc3d4d2649b16fd3642c534.
remove LAUNCHER_OPTS