Add linting for yaml files (#186)

* rename check-scripts target to lint
* install yamllint through pip on travis
* add yamllint config, do not fail on too long lines
* fix yaml linting errors
* remove circular dependency

examples/core.yml

@@ -38,7 +38,7 @@ services:
       retries: 4
     networks:
       - kopano-net
-  
+
   kopano_ssl:
     image: ${docker_repo:-zokradonh}/kopano_ssl
     container_name: kopano_ssl

examples/meet-kopano.yml

@@ -14,18 +14,18 @@ services:
       - FQDN=${FQDN?err}
     command: wrapper.sh
     cap_drop:
-     - ALL
+      - ALL
     cap_add:
-     - NET_BIND_SERVICE
-     - CHOWN
-     - SETGID
-     - SETUID
+      - NET_BIND_SERVICE
+      - CHOWN
+      - SETGID
+      - SETUID
     volumes:
       - web:/.kweb
     networks:
       web-net:
         aliases:
-         - ${FQDNCLEANED?err}
+          - ${FQDNCLEANED?err}
 
   kopano_ssl:
     image: ${docker_repo:-zokradonh}/kopano_ssl
@@ -73,35 +73,35 @@ services:
       - /etc/kopano/ssl:/kopano/ssl
       - /run/kopano:/run/kopano
     environment:
-     - FQDN=${FQDN}
+      - FQDN=${FQDN}
     networks:
-     - web-net
+      - web-net
 
   kopano_kwmserver:
     image: ${docker_repo:-zokradonh}/kopano_kwmserver:${KWM_VERSION:-latest}
     container_name: kopano_kwmserver
     command: wrapper.sh
     environment:
-     - INSECURE=${INSECURE}
-     - oidc_issuer_identifier=https://${FQDN}
+      - INSECURE=${INSECURE}
+      - oidc_issuer_identifier=https://${FQDN}
     volumes:
       - /etc/kopano/ssl:/kopano/ssl
     networks:
-     - web-net
+      - web-net
 
   kopano_meet:
     image: ${docker_repo:-zokradonh}/kopano_meet:${MEET_VERSION:-latest}
     container_name: kopano_meet
     environment:
-     - SERVICE_TO_START=meet
-     - KCCONF_KWEBD_TLS=no
+      - SERVICE_TO_START=meet
+      - KCCONF_KWEBD_TLS=no
     depends_on:
-     - kopano_kapi
-     - kopano_konnect
-     - kopano_kwmserver
-     - web
+      - kopano_kapi
+      - kopano_konnect
+      - kopano_kwmserver
+      - web
     networks:
-     - web-net
+      - web-net
 
 volumes:
   web:

examples/webapp.yml

@@ -14,18 +14,18 @@ services:
       - FQDN=${FQDN}
     command: wrapper.sh
     cap_drop:
-     - ALL
+      - ALL
     cap_add:
-     - NET_BIND_SERVICE
-     - CHOWN
-     - SETGID
-     - SETUID
+      - NET_BIND_SERVICE
+      - CHOWN
+      - SETGID
+      - SETUID
     volumes:
       - web:/.kweb
     networks:
       web-net:
         aliases:
-         - ${FQDN}
+          - ${FQDN}
 
   kopano_webapp:
     image: ${docker_repo:-zokradonh}/kopano_webapp:${WEBAPP_VERSION:-latest}