mta.postfix->global.mta pillar; remove mta profile

This is more a MTA configuration for system email on all hosts instead of
a dedicated email server role.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

pillar/global/init.sls

@@ -1,7 +1,7 @@
 include:
   - role.salt.common
   - role.salt.minion
-  - role.mta.postfix
+  - .mta
 
 managed_header_pound: |
   ### This file is managed via https://git.com.de/LibertaCasa/salt

salt/common/suse.sls

@@ -3,7 +3,8 @@ include:
   - profile.zypp
   - profile.node_exporter
   - users
-  - role.mta.postfix
+  - postfix
+  - postfix.config
 
 {#- to-do: move this to some formula or macro -#}
 {%- set osfullname = grains['osfullname'] -%}

salt/role/mta/postfix.sls

@@ -1,3 +0,0 @@
-include:
-  - postfix
-  - postfix.config