Add test framework to test

- Mail encryption (when expected)
- Introducer listing, adding and removing
- Locals listing, adding and removing

docker/mta_provision/usr/bin/test_1.sh

@@ -1,19 +1,20 @@
 #!/usr/bin/bash
 
-echo "test message" | sendmail -t root@example.com
+adduser --shell /bin/bash --disabled-password --gecos "" mtatest
+echo "test message" | sendmail -t mtatest@example.com
 sleep 1
 
 ## simple test if mail passes
-if [ -f /var/mail/root ] ; then
+if [ -f /var/mail/mtatest ] ; then
   echo "success"
-  rm /var/mail/root
+  rm /var/mail/mtatest
 else
   echo "failure"
   exit 1
 fi
 
 ## test encryption
-## bob@example.com has an authenticated certificate in 
+## bob@example.com has an authenticated certificate in
 ## the cert store
 echo "test message" | sendmail -t bob@example.com
 sleep 1