Urgent (XS) RFR: 8171815) [TESTBUG] Update expected failure message in runtime/modules/IgnoreModulePropertiesTest.java

[David Holmes]

A change we are pulling down from jdk9/dev has changed the error message 
associated with parsing the --patch-module flag. This breaks one of our 
tests and so we need to change the expected error.

I will process this under the trivial change rule - only one Reviewer 
needed; immediate push (with the jdk9/dev changes).

Bug: https://bugs.openjdk.java.net/browse/JDK-8171815

webrev: http://cr.openjdk.java.net/~dholmes/8171815/webrev/

Change:

-        testOption("--patch-module", "=d", "jdk.module.patch.0", 
"Missing module name");
+        testOption("--patch-module", "=d", "jdk.module.patch.0", 
"Unable to parse --patch-module");

Thanks,
David