Run all containers read-only (#314)

* switch containers in compose file to read-only
related to https://github.com/zokradonh/kopano-docker/issues/310
* make scheduler container read-only
* make meet container read-only
* fix konnect for read-only
* make core mostly read-only
* add custom location for ldap.cfg to default config
* sort config option for readability
* update makefile pull workaround
* make kdav read-only
* remove locale generation code from core startup
* fix commander tests
* fix store language tests
* add test for a dutch mailbox
* make it possible to run webapp read-only
* add locale hint to the compose file
* finish read-only mode for z-push

core/defaultconfigs/dagent.py

@@ -3,7 +3,7 @@ import kcconf
 
 # Component specific configurations
 kcconf.configkopano({
-    r"/etc/kopano/dagent.cfg":
+    r"/tmp/kopano/dagent.cfg":
     {
         'lmtp_listen': "0.0.0.0:2003",
         'log_file': "-",
@@ -13,4 +13,4 @@ kcconf.configkopano({
 })
 
 # Override configs from environment variables
-kcconf.configkopano(kcconf.parseenvironmentvariables(r"/etc/kopano/"))
+kcconf.configkopano(kcconf.parseenvironmentvariables(r"/tmp/kopano/"))