Task #10875 - merge to epic #2

.gitattributes

Docker/lofar-triggerservices/Dockerfile

Docker/lofar-triggerservices/bld.yaml

Docker/lofar-triggerservices/build.ini

Docker/lofar-triggerservices/hosts

Docker/lofar-triggerservices/mom.ini

Docker/lofar-triggerservices/momdb_init.sql

.../lofar-triggerservices/roles/buildhostcentos7/.travis.yml

...er/lofar-triggerservices/roles/buildhostcentos7/README.md

...-triggerservices/roles/buildhostcentos7/defaults/main.yml

...riggerservices/roles/buildhostcentos7/files/nsswitch.conf

...ofar-triggerservices/roles/buildhostcentos7/files/ssh-rsa

...rservices/roles/buildhostcentos7/files/zabbix_agentd.conf

...-triggerservices/roles/buildhostcentos7/handlers/main.yml

...ofar-triggerservices/roles/buildhostcentos7/meta/main.yml

...far-triggerservices/roles/buildhostcentos7/tasks/main.yml

...ggerservices/roles/buildhostcentos7/templates/ntp.conf.j2

...ar-triggerservices/roles/buildhostcentos7/tests/inventory

...far-triggerservices/roles/buildhostcentos7/tests/test.yml

...ofar-triggerservices/roles/buildhostcentos7/vars/main.yml