take md5 of cache_id to prevent it from being too long (#259)

* take md5 of cache_id to prevent it from being too long

* remove unecessary decode

Author: fabianvf

openshift/dynamic/client.py

@@ -4,7 +4,7 @@
 import sys
 import copy
 import json
-import base64
+import hashlib
 import tempfile
 from functools import partial
 from six import PY2, PY3
@@ -97,7 +97,7 @@ def __init__(self, client, cache_file=None):
         default_cache_id = self.configuration.host
         if PY3:
             default_cache_id = default_cache_id.encode('utf-8')
-        default_cachefile_name = 'osrcp-{0}.json'.format(base64.b64encode(default_cache_id).decode('utf-8'))
+        default_cachefile_name = 'osrcp-{0}.json'.format(hashlib.md5(default_cache_id).hexdigest())
         self.__resources = ResourceContainer({}, client=self)
         self.__cache_file = cache_file or os.path.join(tempfile.gettempdir(), default_cachefile_name)
         self.__init_cache()