Fix comparing dictionaries for changes detection

Non-unicode and unicode dicts cannot be compared.
That makes paunch failing to detect config changes and
rebuilding containers w/o a need.

Use yaml safe_load in order to produce a non-unicode dict
for the right comparison of config data.

NOTE: This change is different for <= Rocky as we refactored in Stein.
Conflicts:
	paunch/builder/base.py
Change-Id: I507f4b07af2c515fd8548af7dbe6b35ad2a269a9
Closes-Bug: #1810690
Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>
(cherry picked from commit 5558e521ab)
(cherry picked from commit e52fdc0854)

paunch/builder/compose1.py

@@ -14,6 +14,7 @@
 import json
 import logging
 import tenacity
+import yaml
 
 LOG = logging.getLogger(__name__)
 
@@ -101,7 +102,7 @@ class ComposeV1Builder(object):
                 continue
 
             try:
-                ex_data = json.loads(ex_data_str)
+                ex_data = yaml.safe_load(str(ex_data_str))
             except Exception:
                 ex_data = None