Revert "Do not change the default capath of context"

This reverts commit 4fa1142.

Author: andrea-manzi

src/fts3/rest/client/context.py

@@ -145,7 +145,7 @@ def _validate_endpoint(self):
             raise BadEndpoint("%s (%s)" % (self.endpoint, str(e))), None, sys.exc_info()[2]
         return endpoint_info
 
-    def __init__(self, endpoint, ucert=None, ukey=None, verify=True, access_token=None, no_creds=False, capath=None,
+    def __init__(self, endpoint, ucert=None, ukey=None, verify=True, access_token=None, no_creds=False, capath='/etc/grid-security/certificates',
                  request_class=Request, connectTimeout=30, timeout=30):
         self.passwd = None