Add hacking rule for "GET /resources"

This patch is a prototype for "GET /resources" hacking rule.
black_list_T110.txt file contains the service client files which
are against this rule. So we need to fix them with removing them
from this file.

Partially implements blueprint consistent-service-method-names

Change-Id: I150fe2ef21d4d4d246a46d9baf2fb14cc7d79ee5
diff --git a/HACKING.rst b/HACKING.rst
index 3799046..9f7487d 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -17,6 +17,7 @@
 - [T108] Check no hyphen at the end of rand_name() argument
 - [T109] Cannot use testtools.skip decorator; instead use
          decorators.skip_because from tempest-lib
+- [T110] Check that service client names of GET should be consistent
 - [N322] Method's default argument shouldn't be mutable
 
 Test Data/Configuration