Added .gitlab-ci.yml

.gitlab-ci.yml

+image: ubuntu:18.04
+
+stages:
+    - tests
+
+unitTests:
+    stage: tests
+    script: 
+        - apt-get update
+        - apt-get -y install curl
+        - apt-get -y install unzip
+        - bash gut_ci.sh
+    only:
+        - unit-tests
+    variables: 
+        ErrorActionPreference: stop