Add processor process_string_nofloat

In some corner cases, the Heat auth_encryption_key value set by
the user or randomly can be convertible into a float number. This
will make the puppet-heat module to complain, because the size()
function from puppetlabs-stdlib will check that before returning
the array size.

Fixing this by implementing a new processor, that will check for
those cases and change the value to a random 16 char hex string if
needed.

Change-Id: I6d9541692f9f87b100ae1e4651038297c802cbf4

packstack/installer/processors.py

@@ -121,3 +121,17 @@ def process_password(param, param_name, config=None):
             else:
                 param = process_password.pw_dict[param_name]
     return param
+
+
+def process_string_nofloat(param, param_name, config=None):
+    """
+    Process a string, making sure it is *not* convertible into a float
+    If it is, change it into a random 16 char string, and check again
+    """
+    while True:
+        try:
+            float(param)
+        except ValueError:
+            return param
+        else:
+            param = uuid.uuid4().hex[:16]

packstack/plugins/heat_650.py

@@ -56,6 +56,7 @@ def initConfig(controller):
          "OPTION_LIST": [],
          "VALIDATORS": [validators.validate_not_empty],
          "DEFAULT_VALUE": uuid.uuid4().hex[:16],
+         "PROCESSORS": [processors.process_string_nofloat],
          "MASK_INPUT": True,
          "LOOSE_VALIDATION": False,
          "CONF_NAME": "CONFIG_HEAT_AUTH_ENC_KEY",