Work on issues found by pylint (#896)

* Look at possibly-used-before-assignment.

* Use latest beta releases of ansible-core 2.19 for mypy and pylint.

* Look at unsupported-*.

* Look at unknown-option-value.

* Look at redefined-builtin.

* Look at superfluous-parens.

* Look at unspecified-encoding.

* Adjust to new cryptography version and to ansible-core 2.17's pylint.

* Look at super-with-arguments.

* Look at no-else-*.

* Look at try-except-raise.

* Look at inconsistent-return-statements.

* Look at redefined-outer-name.

* Look at redefined-argument-from-local.

* Look at attribute-defined-outside-init.

* Look at unused-variable.

* Look at protected-access.

* Look at raise-missing-from.

* Look at arguments-differ.

* Look at useless-suppression and use-symbolic-message-instead.

* Look at consider-using-dict-items.

* Look at consider-using-in.

* Look at consider-using-set-comprehension.

* Look at consider-using-with.

* Look at use-dict-literal.

plugins/module_utils/_acme/backends.py

@@ -77,14 +77,14 @@ def _parse_acme_timestamp(
     """
     # RFC 3339 (https://www.rfc-editor.org/info/rfc3339)
     timestamp_str = _reduce_fractional_digits(timestamp_str)
-    for format in (
+    for time_format in (
         "%Y-%m-%dT%H:%M:%SZ",
         "%Y-%m-%dT%H:%M:%S.%fZ",
         "%Y-%m-%dT%H:%M:%S%z",
         "%Y-%m-%dT%H:%M:%S.%f%z",
     ):
         try:
-            result = datetime.datetime.strptime(timestamp_str, format)
+            result = datetime.datetime.strptime(timestamp_str, time_format)
         except ValueError:
             pass
         else:
@@ -117,7 +117,7 @@ class CryptoBackend(metaclass=abc.ABCMeta):
                 raise BackendException(f"Invalid value for {name}: {value!r}")
             return result
         except OpenSSLObjectError as exc:
-            raise BackendException(str(exc))
+            raise BackendException(str(exc)) from exc
 
     def interpolate_timestamp(
         self,