netdata/packaging: Trigger stable package generation upon release process (#6766)

enable auto-generation of packages for RPM and DEB, during stable release

.travis.yml

@@ -525,6 +525,15 @@ jobs:
         - .travis/draft_release.sh
       after_failure: post_message "TRAVIS_MESSAGE" "<!here> Draft release submission failed"
 
+    - name: Trigger .RPM and .DEB package generation
+      before_script: post_message "TRAVIS_MESSAGE" "Starting RPM and DEB package generation for release" "${NOTIF_CHANNEL}"
+      script:
+        - if [[ -z "${GIT_TAG}" ]] || [[ ! "${GIT_TAG}" = "$(git tag --points-at)" ]]; then post_message "TRAVIS_MESSAGE" "<!here> I Did not find a valid GIT_TAG to proceed with stable packaging" "${NOTIF_CHANNEL}" && exit 1; fi;
+        - if [[ -n "${GIT_TAG}" ]] && [[ "${GIT_TAG}" = "$(git tag --points-at)" ]]; then .travis/trigger_package_generation.sh; fi;
+      after_failure: post_message "TRAVIS_MESSAGE" "<!here> Stable release package generation produced errors" "${NOTIF_CHANNEL}"
+      git:
+        depth: false
+
 
 
     # This is the nightly pre-execution step (Jobs, preparatory steps for nightly, etc)