Change the MySQL password placeholder to THE_DB_PASSWORD.

dockerfiles/images/mysql/Dockerfile

@@ -10,7 +10,7 @@ RUN add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu $(lsb_release -s
 RUN apt-get --yes --force-yes update
 RUN apt-get --yes --force-yes upgrade 
 
-ENV MYSQL_PASSWORD THE_MYSQL_PASSWORD
+ENV MYSQL_PASSWORD THE_DB_PASSWORD
 
 RUN echo "mysql-server mysql-server/root_password password $MYSQL_PASSWORD" | debconf-set-selections  
 RUN echo "mysql-server mysql-server/root_password_again password $MYSQL_PASSWORD" | debconf-set-selections

dockerfiles/images/postgres/Dockerfile

@@ -1,6 +1,8 @@
 FROM ubuntu
 MAINTAINER SvenDowideit@docker.com
 
+ENV DEBIAN_FRONTEND noninteractive
+
 # Add the PostgreSQL PGP key to verify their Debian packages.
 # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc 
 RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8