Revert "bug fix: get installer using functest_utils"
Revert "bug fix: get installer using functest_utils"

This reverts commit a6a3af39986e61f5f7c9094befec41fd753610d5.

Change-Id: I33d5d77ce166a324582a8f5ca11d75c5d9628c14

mywulin/functest,mywulin/functest,opnfv/functest,opnfv/functest