fix hdmrd5 check of local cached files

Current OBS is delivering hdrmd5 in buildinfo. It turns out
that osc has already code for validating cached files, but it
invalidates all local files atm with python 3.x

osc/build.py

@@ -1288,6 +1288,8 @@ def main(apiurl, opts, argv):
 
     for i in bi.deps:
         if i.hdrmd5:
+            if not i.name.startswith('container:') and i.pacsuffix != 'rpm':
+                continue
             from .util import packagequery
             if i.name.startswith('container:'):
                 hdrmd5 = dgst(i.fullfilename)

osc/fetch.py

@@ -217,6 +217,8 @@ class Fetcher:
 
             if os.path.exists(i.fullfilename):
                 cached += 1
+                if not i.name.startswith('container:') and i.pacsuffix != 'rpm':
+                    continue
                 if i.hdrmd5:
                     from .util import packagequery
                     if i.name.startswith('container:'):