bump bootstrap tag b=409880 r=nthomas

tools/buildbot-configs/automation/production-1.9/master.cfg

@@ -71,7 +71,7 @@ c['sources'].append(PBChangeSource())
 
 cvsroot = ":ext:cltbld@cvs.mozilla.org:/cvsroot"
 cvsmodule = "mozilla/tools/release"
-automation_tag = "RELEASE_AUTOMATION_M6_3"
+automation_tag = "RELEASE_AUTOMATION_M7_1"
 
 c['builders'] = []