feat(git_push_mirror): Added a job that syncs to a remote git repo

User must construct url with userdetails for the sync to work in non-public writable repositories

 Changes to be committed:
	new file:   git_push_mirror/.gitlab-ci.yml
	new file:   git_push_mirror/README.md

issue #1

git_push_mirror/.gitlab-ci.yml

@@ -0,0 +1,22 @@
+
+.git_push_mirror:
+    image: alpine:latest
+    stage: sync
+    before_script:
+        - apk update
+        - apk add git
+    script:
+        - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.com/$CI_PROJECT_PATH --mirror $CI_PROJECT_NAME
+        - cd $CI_PROJECT_NAME 
+        - git remote add destination $GIT_SYNC_URL 
+        - echo "https://gitlab.com/ $CI_PROJECT_PATH / $CI_PROJECT_NAME .git"
+        - git push destination --mirror
+    artifacts:
+        expire_in: 1 day
+    rules:
+      - if: '$CI_COMMIT_BRANCH == "master"'
+      - if: '$CI_COMMIT_BRANCH == "development"'
+        when: always
+
+
+