Define simple healthchecks for simulators

- currently containers are healthy if they have successfully started
their Http servers thus simple endpoint at /healthcheck is sufficient
- to enable docker healthcheck we need to add `curl` to docker images
- http_proxy needs to be provided for docker to be able to build images
behind proxy

Closes ONAP-695

Change-Id: I02f0b8cc2732713b5307dbc34ba604d8185b74fc
Signed-off-by: fkrzywka <filip.krzywka@nokia.com>
Issue-ID: DCAEGEN2-601
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5585f92..a1d94ac 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@
 build:
   stage: build
   script:
-    - mvn -e -T2 -Panalysis clean install
+    - mvn -e -T2 -Panalysis clean install -Ddocker.http_proxy="http://$PROXY_HOST:$PROXY_PORT" -Ddocker.https_proxy="http://$PROXY_HOST:$PROXY_PORT"
   artifacts:
     paths:
       - hv-collector-coverage/target/site/jacoco-aggregate