Pull request #19: Replaced default values with None for some parameters in create_volume function

Merge in SIE-BB/netapp-dataops-toolkit from create-volume-fix to release-v2.7.0

* commit '499c1dba6295e8d6d405e9c94187dab460e3b071':
  Replaced default values with None for some parameters in create_volume function

Author: Karnik, Aarkin

netapp_dataops_traditional/netapp_dataops/traditional/__init__.py

@@ -841,8 +841,8 @@ def create_snapshot(volume_name: str, cluster_name: str = None, svm_name: str =
 
 
 def create_volume(volume_name: str, volume_size: str, guarantee_space: bool = False, cluster_name: str = None, svm_name: str = None,
-                  volume_type: str = "flexvol", unix_permissions: str = "0777",
-                  unix_uid: str = "0", unix_gid: str = "0", export_policy: str = "default", snaplock_type: str = None,
+                  volume_type: str = None, unix_permissions: str = None,
+                  unix_uid: str = None, unix_gid: str = None, export_policy: str = None, snaplock_type: str = None,
                   snapshot_policy: str = None, aggregate: str = None, mountpoint: str = None, junction: str = None, readonly: bool = False,
                   print_output: bool = False, tiering_policy: str = None, vol_dp: bool = False):
     # Retrieve config details from config file