[NFVBENCH-7] Return errors when unknown options are passed

1) Return all errors when unknown options are passed
2) Fixed pep8 warnings
3) Fixed image deletion

Change-Id: If21ca07c797a602b9a60f3ccae665149ed1ac148
Signed-off-by: Kerim Gokarslan <kgokarsl@cisco.com>

2 files changed, 10 insertions, 6 deletions

diff --git a/nfvbench/compute.py b/nfvbench/compute.py
index c8ec383..681a852 100644
--- a/nfvbench/compute.py
+++ b/nfvbench/compute.py
@@ -90,7 +90,7 @@ class Compute(object):
     def delete_image(self, img_name):
         try:
             LOG.log("Deleting image %s...", img_name)
-            img = self.glance_client.images.find(name=img_name)
+            img = self.find_image(image_name=img_name)
             self.glance_client.images.delete(img.id)
         except Exception:
             LOG.error("Failed to delete the image %s.", img_name)
diff --git a/nfvbench/config.py b/nfvbench/config.py
index 2a67b7e..a0587b6 100644
--- a/nfvbench/config.py
+++ b/nfvbench/config.py
@@ -49,17 +49,21 @@ def config_loads(cfg_text, from_cfg=None):
 
 
 def get_err_config(subset, superset):
+    result = {}
     for k, v in subset.items():
         if k not in superset:
-            return {k: v}
-        if v is not None and superset[k] is not None:
+            result.update({k: v})
+        elif v is not None and superset[k] is not None:
             if not isinstance(v, type(superset[k])):
-                return {k: v}
+                result.update({k: v})
+                continue
         if isinstance(v, dict):
             res = get_err_config(v, superset[k])
             if res:
-                return {k: res}
-    return None
+                result.update({k: res})
+    if not result:
+        return None
+    return result
 
 
 def test_config():