Makefile: suffix test log files
Makefile: suffix test log files

In preparation of running all tests inside container.
Currently, we run Jenkins in shared environment.
This is not good. Need manual Go runtime updates,
cannot run two different branches, port conflicts,
out of disk errors, etc.

Signed-off-by: Gyu-Ho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

rnaveiras/etcd,lorneli/etcd,joshix/etcd,ajityagaty/etcd,mqliang/etcd,sebrandon1/etcd,dannysauer/etcd,bluebreezecf/etcd,mqliang/etcd,li-ang/etcd,YuleiXiao/etcd,etcd-io/etcd,dannysauer/etcd,li-ang/etcd,etcd-io/etcd,whuwxl/etcd,cockroachdb/etcd,gyuho/etcd,whuwxl/etcd,vimalk78/etcd,bluebreezecf/etcd,fanminshi/etcd,mkumatag/etcd,mkumatag/etcd,bdarnell/etcd,YuleiXiao/etcd,rnaveiras/etcd,mqliang/etcd,gyuho/etcd,rnaveiras/etcd,joshix/etcd,xiang90/etcd,ajityagaty/etcd,heyitsanthony/etcd,coreos/etcd,sebrandon1/etcd,ajityagaty/etcd,glevand/coreos--etcd,cockroachdb/etcd,lorneli/etcd,fanminshi/etcd,akauppi/etcd,sinsharat/etcd,vimalk78/etcd,glevand/coreos--etcd,akauppi/etcd,mkumatag/etcd,bdarnell/etcd,sinsharat/etcd,coreos/etcd,xiang90/etcd,heyitsanthony/etcd,etcd-io/etcd