yum: fallback to epoch=0 if not available

lib/ansible/modules/packaging/os/yum.py

@@ -616,7 +616,7 @@ def local_envra(path):
     finally:
         os.close(fd)
 
-    return '%s:%s-%s-%s.%s' % (header[rpm.RPMTAG_EPOCH],
+    return '%s:%s-%s-%s.%s' % (header[rpm.RPMTAG_EPOCH] or '0',
                                header[rpm.RPMTAG_NAME],
                                header[rpm.RPMTAG_VERSION],
                                header[rpm.RPMTAG_RELEASE],
@@ -755,7 +755,7 @@ def install(module, items, repoq, yum_basecmd, conf_file, en_repos, dis_repos, i
         elif '://' in spec:
             # download package so that we can check if it's already installed
             package = fetch_rpm_from_url(spec, module=module)
-            envra = local_envra(module, package)
+            envra = local_envra(package)
             if is_installed(module, repoq, envra, conf_file, en_repos=en_repos, dis_repos=dis_repos, installroot=installroot):
                 # if it's there, skip it
                 continue