fix: Load the organization ID as a string

This is a workaround to a bug in dynaconf. OrgID is commonly
(but doesn't have to be) a string-integer, and gets parsed as int
instead (on versions >3.2.3). According to the bug report linked
in the patch, it will be addressed in dynaconf>=3.3.0.

pytest_client_tools/test_config.py

@@ -30,6 +30,11 @@ def __init__(self):
             Validator("candlepin.activation_keys", is_type_of=list),
             Validator(
                 "candlepin.org",
+                is_type_of=str,
+                # Fix for a regression in dynaconf, can be removed with dynaconf>=3.3.0
+                # https://github.com/dynaconf/dynaconf/issues/1064
+                #  "Validator default string parsed to number"
+                cast=str,
                 must_exist=True,
                 when=Validator(
                     "candlepin.activation_keys",