Detect rule name duplication in Guvnor

+++ This bug was initially created as a clone of Bug #862163 +++

Description of problem:

Platform BZ for https://issues.jboss.org/browse/GUVNOR-1948

Steps to Reproduce:
See details in GUVNOR-1948

Actual results:

1. 'Build package' finishes successfully
2. [QA] -> [Analysis] doesn't raise a WARNING

Expected results:

1. Build package' fails with an error massage
2. [QA] -> [Analysis] raises a WARNING

— Additional comment from JBoss JIRA Server on 2012-12-06 17:00:07 EST —

Adriel Paredes <aparedes@redhat.com> made a comment on jira GUVNOR-1948

I think that the warning should raise in the moment you are creating a new rule

— Additional comment from JBoss JIRA Server on 2012-12-06 20:33:37 EST —

Toshiya Kobayashi <tkobayas@redhat.com> made a comment on jira GUVNOR-1948

A same issue arises when you upload 2 XLS files and both have the same 'RuleTable' name which is used as rule name prefix.

Attached repository_export_duplicate_rules_xls.xml.

— Additional comment from Geoffrey De Smet on 2013-03-05 08:39:58 EST —

Reassign to the guvnor team, now that I am working full time on planner. So these issues aren't forgotten.