Feat/MDD-189: Improved 2.4.103 MISP Server Image (#34)

## Feat/MDD-189: Improved 2.4.103 MISP Server Image
### Update Information
Features of the release:
- This MISP server 2.4.103 release has an improved mechanism to sync the different start scripts. First start Redis and DB and after this start apache2. Then all other scripts.
### General Changes
Besides the modified MISP version (2.4.103), no general changes were made.
### Fixes and Improvements
- Changed license file
- Added "entrypoint.sh" script for supervisord
- Removed entrypoint_monitoring.sh
- Removed entrypoint_syslog-ng.sh
- Added "entrypoint_worker.sh"
- Changed misp_cron.sh and misp_update.sh
- Changed Dockerfile for 2.4.103 to fit to the official MISP documentation
- Added enviroment variables
- Changed all entrypoint scripts to support green colored start output tag
- 
### Detailed Changes
- Changed License file
  Added current year to License file
- Added "entrypoint.sh" script for supervisord
- Removed entrypoint_monitoring.sh
  It is not more needed.
- Removed entrypoint_syslog-ng.sh
  It is not more needed.
- Added "entrypoint_worker.sh"
  MISP workers get an own entrypoint_worker.sh start script
- Changed misp_cron.sh and misp_update.sh
  Improved misp_cron.sh script and misp_update.sh script at the way how the get their AUTH token from DB
- Changed Dockerfile for 2.4.103 to fit to the official MISP documentation
- Added environent variables:
  - PHP_MEMORY_LIMIT="512M"
  - PHP_MAX_EXECUTION_TIME="600"
  - PHP_UPLOAD_MAX_FILESIZE="50M"
  - PHP_POST_MAX_SIZE="50M"

.gitlab-ci.yml

@@ -60,4 +60,4 @@ include:
   - '2.4.100-debian/.gitlab-ci.yml'
   - '2.4.101-debian/.gitlab-ci.yml'
   - '2.4.102-debian/.gitlab-ci.yml'
-  - '2.4.103-debian/.gitlab-ci.yml'
+  - '2.4.103-debian/.gitlab-ci.yml'

.travis.yml

@@ -12,9 +12,6 @@ env:
   # - DOCKER_SLUG
   # - DOCKER_USERNAME
   # - DOCKER_PASSWORD
-  # - CUSTOM_REGISTRY_URL
-  # - CUSTOM_REGISTRY_USER
-  # - CUSTOM_REGISTRY_PW
   matrix:
   - VERSION=2.4.88-ubuntu
   - VERSION=2.4.89-ubuntu