Makefile: implement checks as a part of system tests targets

Signed-off-by: Erik Hollensbe <[email protected]>

Author: erikh

Makefile

@@ -87,12 +87,12 @@ unit-test-centos: stop clean
 system-test: system-test-singlehost system-test-multihost
 
 # the `make stop` here and below are necessary because build leaves around a VM (intentionally)
-system-test-singlehost: stop clean build
+system-test-singlehost: stop clean checks build
 	make stop
 	godep go test -v --timeout 30m -run "sanity" \
 					   github.com/contiv/netplugin/systemtests/singlehost 
 
-system-test-multihost: stop clean
+system-test-multihost: stop clean checks build
 	make build stop
 	godep go test -v --timeout 80m -run "sanity" \
 					   github.com/contiv/netplugin/systemtests/twohosts