LPS-52053 Remove public reference to GroupTestUtil.addGroup(long, long, long, String, String)
LPS-52053 Remove GroupTestUtil.addGroup(String)
LPS-52053 Remove GroupTestUtil.addGroup(long, String, String)
LPS-52053 Remove GroupTestUtil.addGroup(long, String)
LPS-52053 Always use random strings, and eliminate duplicated code