Remove unnecessary setUp function in testcase
Remove unnecessary setUp function in testcase

In testcase, setUp will be called automatically. This patch used to
remove setUp functions that do nothing. Besides, it will keep code clean.

Change-Id: I60e368dc066af30ce2e53bf7e4cc7bba69387cd8

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible