Add GlobalBundleScanningSchemaServiceImpl.destroyInstance for cleanup in tests

Change-Id: Id0f6f65f5a0a00bfb8271cd68700545d1c05e5f6
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>
Merge "Add GlobalBundleScanningSchemaServiceImpl.destroyInstance for cleanup in tests"