Add test implementation of goss (#222)

* add test target for goss
split test-ci up to later add goss to it
* bring back chown of /kopano/data
* use a dedicated goss file for kopano-server
* add todo

webapp/goss.yaml

@@ -0,0 +1,8 @@
+port:
+  tcp6:9080:
+    listening: true
+process:
+  kwebd:
+    running: true
+  php-fpm7.0:
+    running: true

webapp/goss_wait.yaml

@@ -0,0 +1,3 @@
+port:
+  tcp6:9080:
+    listening: true