Always create directories when moving RPMs

Even if there are no RPMs to move and even source directory does
not exist, we still need to create target directory because
we rely on its existence later.

Closes-Bug: #1218229
Change-Id: I382794ab6455f045cbd8d8b3a1b2919fadee983f

anvil/packaging/yum.py

@@ -161,10 +161,12 @@ class YumDependencyHandler(base.DependencyHandler):
                     self._move_srpms("anvil")
 
     def _move_rpm_files(self, source_dir, target_dir):
-        if not sh.isdir(source_dir):
-            return
+        # NOTE(imelnikov): we should create target_dir even if we have
+        #  nothing to move, because later we rely on its existence
         if not sh.isdir(target_dir):
             sh.mkdirslist(target_dir, tracewriter=self.tracewriter)
+        if not sh.isdir(source_dir):
+            return
         for filename in sh.listdir(source_dir, recursive=True, files_only=True):
             if not filename.lower().endswith(".rpm"):
                 continue