TT#29456 Cleanup testsuite/Makefile after migration to docker

Change-Id: Ibde17985282f387dfa222c91ceb30d9d3efb59ec

testsuite/Makefile

@@ -1,19 +1,12 @@
-all: prepare test
+RESULTS ?= results
 
-# use our own cpan mirror
-export PERL_CARTON_MIRROR=http://deb.sipwise.com/cpan/
-
-prepare:
-	carton --verbose install
+all: test
 
 test:
-	mkdir -p ../reports/
-	rm -f ../reports/ngcp-network.tap
-	bash ./ngcp-network > ../reports/ngcp-network.tap
+	bash ./ngcp-network > $(RESULTS)/ngcp-network.tap
 
 clean:
 	rm -rf testfiles
 
 dist-clean: clean
-	rm -rf ../reports/
-	rm -rf local
+	rm -rf $(RESULTS)