move hostname validation regex to skydns client

onedns/clients/one.py

@@ -1,8 +1,5 @@
-import re
 import oca
 
-RE_VALIDNAME = re.compile('[^\w\d.-]')
-
 
 class OneClient(object):
     """

onedns/clients/skydns.py

@@ -1,7 +1,10 @@
+import re
 import etcd
 
 from onedns.logger import log
 
+RE_VALIDNAME = re.compile('[^\w\d.-]')
+
 
 class SkyDNSClient(object):
     def __init__(self, etcd_kwargs={}):