[VOL-4638] Add communication with VOLTHA NBI and the Olt app REST APIs

Change-Id: I6ccf5725a108b91f47dfc4c20e9614b38c71419a
diff --git a/Makefile b/Makefile
index 2354518..e0f3c8b 100644
--- a/Makefile
+++ b/Makefile
@@ -47,7 +47,7 @@
 	--build-arg org_opencord_vcs_dirty="${DOCKER_LABEL_VCS_DIRTY}"
 
 # tool containers
-VOLTHA_TOOLS_VERSION ?= 2.5.2
+VOLTHA_TOOLS_VERSION ?= 2.5.3
 
 GO                = docker run --rm --user $$(id -u):$$(id -g) -v ${CURDIR}:/app $(shell test -t 0 && echo "-it") -v gocache:/.cache -v gocache-${VOLTHA_TOOLS_VERSION}:/go/pkg voltha/voltha-ci-tools:${VOLTHA_TOOLS_VERSION}-golang go
 GO_JUNIT_REPORT   = docker run --rm --user $$(id -u):$$(id -g) -v ${CURDIR}:/app -i voltha/voltha-ci-tools:${VOLTHA_TOOLS_VERSION}-go-junit-report go-junit-report