bbclass: bb.fatal() clean up

The bb.fatal() is defined as:

def fatal(*args):
    logger.critical(''.join(args))
    sys.exit(1)

So anything after bb.fatal() in the same code block doesn't have any
effect, e.g.:

    bb.fatal("%s_%s: %s" % (var, pkg, e))
    raise e

The "raise e" should be removed.

I searched all the files which use bb.fatal(), only the following 3
classes have this issues:

  insane.bbclass
  package.bbclass
  package_rpm.bbclass

[YOCTO #4461]

(From OE-Core rev: 4c47525c5a171b1282615c9fbc7d84addef85f92)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/package.bbclass

@@ -372,7 +372,6 @@ python package_get_auto_pr() {
             auto_pr=prserv_get_pr_auto(d)
         except Exception as e:
             bb.fatal("Can NOT get PRAUTO, exception %s" %  str(e))
-            return
         if auto_pr is None:
             if d.getVar('PRSERV_LOCKDOWN', True):
                 bb.fatal("Can NOT get PRAUTO from lockdown exported file")