Adds env var for running integration tests locally

* Specify env var KAMEL_LOCAL to install kamel from local build rather
  than fetching it from OLM (adds --olm=false to install command)

e2e/support/test_support.go

@@ -158,6 +158,11 @@ func KamelWithContext(ctx context.Context, args ...string) *cobra.Command {
 	var c *cobra.Command
 	var err error
 
+	kamelLocal := os.Getenv("KAMEL_LOCAL")
+	if kamelLocal == "true" && len(args) > 0 && args[0] == "install" {
+		args = append(args, "--olm=false")
+	}
+
 	kamelArgs := os.Getenv("KAMEL_ARGS")
 	kamelDefaultArgs := strings.Fields(kamelArgs)
 	args = append(kamelDefaultArgs, args...)