Move install script error handling to a common function

All of our install/admin scripts had a try/except block calling the
main function and handling common exceptions. These were copy-pasted
from each other and modified to various levels of sophistication.
This refactors them out of installers to a single function, which
includes a final pass/fail message for all of the scripts.

Non-install scripts that set up the same log handler levels for
stderr and log file are not changed, as it's not possible to log
to only the logfile without changing the logger configuration.

https://fedorahosted.org/freeipa/ticket/2071

install/tools/ipa-compat-manage

@@ -196,24 +196,5 @@ def main():
 
     return retval
 
-try:
-    if __name__ == "__main__":
-        sys.exit(main())
-except BadSyntax, e:
-    print "There is a syntax error in this update file:"
-    print "  %s" % e
-    sys.exit(1)
-except RuntimeError, e:
-    print "%s" % e
-    sys.exit(1)
-except SystemExit, e:
-    sys.exit(e)
-except KeyboardInterrupt, e:
-    sys.exit(1)
-except config.IPAConfigError, e:
-    print "An IPA server to update cannot be found. Has one been configured yet?"
-    print "The error was: %s" % e
-    sys.exit(1)
-except errors.LDAPError, e:
-    print "An error occurred while performing operations: %s" % e
-    sys.exit(1)
+if __name__ == '__main__':
+    installutils.run_script(main, operation_name='ipa-compat-manage')