Removed test modules with outdated tests

*Deleting modules that contain old version of tests
*Removed tests are in the following files:
 test_add_image_member.py
 test_add_image_tag.py
 test_add_image_tag_negative.py
 test_update_image_member.py

Change-Id: I2d14024f691ab5a05bba53f9edbd3547f789c211
Merge "Removed test modules with outdated tests"