Add test framework to test

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

docker/MTAContainerFile

@@ -52,10 +52,13 @@ RUN apt-get update -yqq && \
   openssh-client \
   sudo \
   postfix \
+  postfix-pcre \
   rsyslog \
   postgresql \
   openssl \
-  sq
+  sq \
+  bind9-host \
+  inotify-tools
 
 RUN adduser --shell /bin/bash --disabled-password --gecos "" hockeypuck