Updates to XINDEXExceptGen script
Updates to XINDEXExceptGen script

* Create <package>/XINDEXException directory recursively
* Routines that start with "%" or lowercase letters are captured properly
* Append lines to exception files (instead of writing from scratch)
* Don't add duplicate exceptions
* Don't process LastTest.log

Change-Id: I74ca8f6f9dcced9674ffd0a9e061e61ea8d0b445

OSEHRA/VistA,josephsnyder/VistA,OSEHRA/VistA,OSEHRA/VistA,OSEHRA/VistA,OSEHRA/VistA,josephsnyder/VistA,OSEHRA/VistA,josephsnyder/VistA,josephsnyder/VistA,josephsnyder/VistA,josephsnyder/VistA