Switch config.mk to master branch for fuel projects
Switch config.mk to master branch for fuel projects

Due to bug[1] in Gerrit, 7.0-only patchset has been applied  to master. We
obviously want to track master in master branch…

[1] https://code.google.com/p/gerrit/issues/detail?id=1107

Change-Id: I1c7a86711295bcb677db6778f57ab016ce53f149
Related-bug: #1466640

SergK/fuel-main,SergK/fuel-main,AnselZhangGit/fuel-main,AnselZhangGit/fuel-main,stackforge/fuel-main,stackforge/fuel-main,eayunstack/fuel-main,huntxu/fuel-main,stackforge/fuel-main,huntxu/fuel-main,AnselZhangGit/fuel-main,AnselZhangGit/fuel-main,huntxu/fuel-main,eayunstack/fuel-main,eayunstack/fuel-main,SergK/fuel-main