Introduce moodlehq/moodle-db-oracle-r2, aiming to be public again

.travis.yml

@@ -1,9 +1,9 @@
 language: bash
 services: docker
 install:
-    - docker build -t moodle-db-oracle .
+    - docker build -t moodle-db-oracle-r2 .
 script:
-    - docker run --name test0 -p 1521:1521 -d moodle-db-oracle
+    - docker run --name test0 -p 1521:1521 -d moodle-db-oracle-r2
     - until docker logs test0 | grep -q 'Database opened.'; do echo 'Waiting for oracle to come up...' && sleep 15; done
     # Extremely nasty command to get the oracle version..
     # We have to work around the lack of piping/env variables..

Dockerfile

@@ -1,4 +1,5 @@
 FROM wnameless/oracle-xe-11g-r2:latest
 ENV ORACLE_ALLOW_REMOTE true
+ENV ORACLE_DISABLE_ASYNCH_IO=true
 
 ADD root /

README.md

@@ -6,19 +6,17 @@ An Oracle XE instance configured for Moodle development based on [wnameless/dock
 # Example usage
 
 ```bash
-docker run --name db0 -p 1521:1521 moodlehq/moodle-db-oracle
+docker run --name db0 -p 1521:1521 moodlehq/moodle-db-oracle-r2
 ```
 # Bulding locally
 
-Since this image can't be pulled from Docker repo at the moment
-([MDLSITE-5669](https://tracker.moodle.org/browse/MDLSITE-5669)) one may need
-to build it for local usage:
+If there is any future problem with this public image (like it happened before, see [MDLSITE-5669](https://tracker.moodle.org/browse/MDLSITE-5669)), or if you want to build the image locally for any further improvement, you can use:
 
 ```bash
 > git clone git@github.com:moodlehq/moodle-db-oracle.git
-> docker build ./moodle-db-oracle --tag moodlehq/moodle-db-oracle
+> docker build ./moodle-db-oracle --tag moodlehq/moodle-db-oracle-r2
 ```
-This will create local image `moodlehq/moodle-db-oracle` which is then can be
+This will create local image `moodlehq/moodle-db-oracle-r2` which is then can be
 used in `docker run` command or by [moodle-docker](https://github.com/moodlehq/moodle-docker) testing tools.
 
 # Features:
@@ -27,6 +25,7 @@ used in `docker run` command or by [moodle-docker](https://github.com/moodlehq/m
 
 # See also
 This container is part of a set of containers for Moodle development, see also:
+
 * [moodle-docker](https://github.com/moodlehq/moodle-docker) a docker-composer based set of tools to get Moodle development running with zero configuration
 * [moodle-php-apache](https://github.com/moodlehq/moodle-php-apache) PHP and Apache configured for Moodle development
 * [moodle-db-mssql](https://github.com/moodlehq/moodle-db-mssql) Microsoft SQL Server for Linux configured for Moodle development