crypto_attach: Fixed issue with set/dict

Signed-off-by: Andreas Maier <maiera@de.ibm.com>

zhmc_ansible_modules/zhmc_crypto_attachment.py

@@ -426,7 +426,7 @@ def ensure_attached(params, check_mode):
             raise Error("No crypto adapters of type {!r} found on CPC {!r} ".
                         format(crypto_type, cpc_name))
 
-        all_adapters_dict = {(a.name, a) for a in all_adapters}
+        all_adapters_dict = {a.name: a for a in all_adapters}
 
         # All crypto adapters in a CPC have the same number of domains
         # (otherwise the concept of attaching domains across all attached