Fix the multiple storage backends incompatibility testing
Fix the multiple storage backends incompatibility testing

Fixes the areComponentsMutuallyExclusive method to work properly

Change-Id: I11ea9608fdb02e2f1d3c4523f18733f7b7d5c50d
Closes-Bug: 1526969

huntxu/fuel-web,stackforge/fuel-web,stackforge/fuel-web,huntxu/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,stackforge/fuel-web,eayunstack/fuel-web