[pwx-29485] update container build tests

Author: pure-jliao

Makefile

@@ -179,7 +179,7 @@ container:
 	@echo "Building operator image $(OPERATOR_IMG)"
 	docker build --pull --tag $(OPERATOR_IMG) -f build/Dockerfile .
 
-DOCK_BUILD_CNT	:= golang:1.19.1
+DOCK_BUILD_CNT	:= golang:1.19
 
 docker-build:
 	@echo "Building using docker"

drivers/storage/portworx/components_test.go

@@ -4944,7 +4944,6 @@ func setupEtcHosts(t *testing.T, ip string, hostnames ...string) {
 
 	// update content
 	bb := bytes.NewBuffer(content)
-	bb.WriteRune('\n')
 	bb.WriteString(tempEtcHostsMarker)
 	bb.WriteRune('\n')
 	for _, hn := range hostnames {