cfg-checker ceph bench module alpha version

 - Ceph benchmark report (beta)
 - Updated result time choosing. Now results reported based on start time
 - New methods for listing
 - Cleanup-only mode
 - Unified results processing
 - Additional ceph info gather
 - Experimental barchart graph example

Fixes:
 - Kube API client recreated each time for stability (HTTP/WebSocket specifics)
 - args naming fixes
 -

Change-Id: Id541f789a00ab4ee827603c5b6f7f07899aaa7c5
diff --git a/cfg_checker/common/file_utils.py b/cfg_checker/common/file_utils.py
index 6fbb675..faf7cf0 100644
--- a/cfg_checker/common/file_utils.py
+++ b/cfg_checker/common/file_utils.py
@@ -102,7 +102,7 @@
         os.mkdir(_folder)
         return "... folder '{}' created".format(_folder)
     else:
-        return "... folder is at '{}'".format(_folder)
+        return "... folder exists at '{}'".format(_folder)
 
 
 def ensure_folder_removed(_folder):