setup.py: moves the mock dependency to tests_require

setup.py

@@ -45,7 +45,6 @@ setup(name=name,
         'GitPython', #needed for git manipulation into slaprunner
         'passlib',
         'netifaces',
-        'mock',
       ] + additional_install_requires,
       extras_require = {
         'lampconfigure':  ["mysqlclient"], #needed for MySQL Database access
@@ -55,6 +54,9 @@ setup(name=name,
         'networkbench' : ['pycurl'], 
         'check_web_page_http_cache_hit' : ['pycurl'], # needed for check_web_page_http_cache_hit module
       },
+      tests_require=[
+        'mock',
+      ],
       zip_safe=False, # proxy depends on Flask, which has issues with
                       # accessing templates
       entry_points={