Don't fail on dupes in version specific files

The rot won't be unwound for another 6-12 months, and we're not
backporting all the infrastructure to do markers to older releases. So
we need to warn only, rather than erroring, when encountering this
situation.

Change-Id: Ib63996b016f7f99f69ad1255c333cc2d1846cbdb

jenkins/scripts/project-requirements-change.py

@@ -68,8 +68,8 @@ class RequirementsList(object):
                 if not name:
                     # Comments and other unprocessed lines
                     continue
-                if strict and name in reqs:
                 print("Requirement %s present in multiple files" % name)
+                if strict and name in reqs and not '-py' in fname:
                     self.failed = True
                 reqs[name].update(r for (r, line) in entries)