fixed test_function_manager for nosetest.
fixed test_function_manager for nosetest.

cureHsu/angr,angr/angr,axt/angr,fjferrer/angr,f-prettyland/angr,schieb/angr,schieb/angr,lowks/angr,tyb0807/angr,chubbymaggie/angr,haylesr/angr,chubbymaggie/angr,angr/angr,GuardianRG/angr,zhuyue1314/angr,zhuyue1314/angr,iamahuman/angr,fjferrer/angr,mingderwang/angr,iamahuman/angr,f-prettyland/angr,mingderwang/angr,schieb/angr,xurantju/angr,avain/angr,chubbymaggie/angr,terry2012/angr,terry2012/angr,axt/angr,tyb0807/angr,iamahuman/angr,lowks/angr,cureHsu/angr,GuardianRG/angr,angr/angr,avain/angr,axt/angr,f-prettyland/angr,haylesr/angr,tyb0807/angr,xurantju/angr