Usersync creates logs many errors with $ in the username or groupname

$ is causing trouble in usersync. Will see Errors of the following:

31 Oct 2016 23:47:46 ERROR LdapUserGroupBuilder UnixUserSyncThread - sink.addOrUpdateUser failed with exception: POST http://localhost:6080/service/xusers/users/userinfo returned a response status of 404 Not Found, for user: qu8g$s5, groups: [test]
31 Oct 2016 23:47:46 WARN PolicyMgrUserGroupBuilder UnixUserSyncThread - ERROR: Unable to delete GROUP: test from USER:qu8g$s6
java.lang.IllegalArgumentException: Illegal group reference
at java.util.regex.Matcher.appendReplacement(Matcher.java:808)
at java.util.regex.Matcher.replaceAll(Matcher.java:906)
at java.lang.String.replaceAll(String.java:2162)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:631)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:616)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.addOrUpdateUser(PolicyMgrUserGroupBuilder.java:332)
at org.apache.ranger.ldapusersync.process.LdapUserGroupBuilder.getUserGroups(LdapUserGroupBuilder.java:530)
at org.apache.ranger.ldapusersync.process.LdapUserGroupBuilder.updateSink(LdapUserGroupBuilder.java:470)
at org.apache.ranger.usergroupsync.UserGroupSync.syncUserGroup(UserGroupSync.java:113)
at org.apache.ranger.usergroupsync.UserGroupSync.run(UserGroupSync.java:87)
at java.lang.Thread.run(Thread.java:745)
31 Oct 2016 23:47:47 WARN PolicyMgrUserGroupBuilder UnixUserSyncThread - ERROR: Unable to delete GROUP: test from USER:qu8g$s6
java.lang.IllegalArgumentException: Illegal group reference
at java.util.regex.Matcher.appendReplacement(Matcher.java:808)
at java.util.regex.Matcher.replaceAll(Matcher.java:906)
at java.lang.String.replaceAll(String.java:2162)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:631)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:616)
at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.addOrUpdateUser(PolicyMgrUserGroupBuilder.java:332)
at org.apache.ranger.ldapusersync.process.LdapUserGroupBuilder.getUserGroups(LdapUserGroupBuilder.java:530)
at org.apache.ranger.ldapusersync.process.LdapUserGroupBuilder.updateSink(LdapUserGroupBuilder.java:470)
at org.apache.ranger.usergroupsync.UserGroupSync.syncUserGroup(UserGroupSync.java:113)
at org.apache.ranger.usergroupsync.UserGroupSync.run(UserGroupSync.java:87)
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