Avoid crash in check mode (#243)

* Do not let AnsibleModule crash when setting permissions on not yet existing files in check mode.

* Add tests.

* Fix bugs.

plugins/module_utils/crypto/support.py

@@ -371,6 +371,8 @@ class OpenSSLObject(object):
 
         def _check_perms(module):
             file_args = module.load_file_common_arguments(module.params)
+            if module.check_file_absent_if_check_mode(file_args['path']):
+                return False
             return not module.set_fs_attributes_if_different(file_args, False)
 
         if not perms_required: