BZ-1169161 - [JBPM-4518] JBossUserGroupCallbackImpl should support "org.jbpm.ht.user.separator" property to customize "Group Id" separator for groups

(cherry picked from commit 0cfaa5e4d301a3b2dcb83cee32cd6c0233137e39)
avoid any modification to queries when loading them to manager to prevent of any issues while parser provides data in chunks

(cherry picked from commit b90108138a2b3f7de7132d99aef36b6f262757bd)