Grouper Loader consumer name may be mangled by GrouperUtil.stripStart, leading to ClassNotFoundException

edu.internet2.middleware.grouper.util.GrouperUtil.stripStart incorrectly strips the start of the string.

Example: "CHANGE_LOG_consumer_umndb" will return "db" instead of "umndb"

"stripChars.indexOf(str.charAt(start))" in the final else statement should be "stripChars.indexOf(str.charAt(start), start)" to prevent characters in stripChars from being matched multiple times.

A workaround is to use a consumer name that starts with a character that is not present in the stripChars string.