Use MongoDB as default db in docker-compose file

docker-compose.yml

@@ -28,7 +28,7 @@ services:
       - /data
     command: "true"
 
-  bdb:
+  bdb-rdb:
     build:
       context: .
       dockerfile: Dockerfile-dev
@@ -50,7 +50,7 @@ services:
       - "9984"
     command: bigchaindb start
   
-  bdb-mdb:
+  bdb:
     build:
       context: .
       dockerfile: Dockerfile-dev

docs/server/source/dev-and-test/setup-run-node.md

@@ -98,19 +98,19 @@ web interface at: http://0.0.0.0:58080/.
 Start a BigchainDB node:
 
 ```bash
-docker-compose up -d bdb
+docker-compose up -d bdb-rdb
 ```
 
 You can monitor the logs:
 
 ```bash
-docker-compose logs -f bdb
+docker-compose logs -f bdb-rdb
 ```
 
 If you wish to run the tests:
 
 ```bash
-docker-compose run --rm bdb py.test -v -n auto
+docker-compose run --rm bdb-rdb py.test -v -n auto
 ```
 
 ### Docker with MongoDB
@@ -130,19 +130,19 @@ $ docker-compose port mdb 27017
 Start a BigchainDB node:
 
 ```bash
-docker-compose up -d bdb-mdb
+docker-compose up -d bdb
 ```
 
 You can monitor the logs:
 
 ```bash
-docker-compose logs -f bdb-mdb
+docker-compose logs -f bdb
 ```
 
 If you wish to run the tests:
 
 ```bash
-docker-compose run --rm bdb-mdb py.test -v --database-backend=mongodb
+docker-compose run --rm bdb py.test -v --database-backend=mongodb
 ```
 
 ### Accessing the HTTP API

tests/README.md

@@ -68,20 +68,6 @@ The `pytest` command has many options. If you want to learn about all the things
 
 You can also use [Docker Compose](https://docs.docker.com/compose/) to run all the tests.
 
-#### With RethinkDB as the backend
-
-First, start `RethinkDB` in the background:
-
-```text
-$ docker-compose up -d rdb
-```
-
-then run the tests using:
-
-```text
-$ docker-compose run --rm bdb py.test -v
-```
-
 #### With MongoDB as the backend
 
 First, start `MongoDB` in the background:
@@ -93,7 +79,7 @@ $ docker-compose up -d mdb
 then run the tests using:
 
 ```text
-$ docker-compose run --rm bdb-mdb py.test -v
+$ docker-compose run --rm bdb py.test -v
 ```
 
 If you've upgraded to a newer version of BigchainDB, you might have to rebuild
@@ -103,8 +89,22 @@ the images before being able to run the tests. Run:
 $ docker-compose build
 ```
 
+#### With RethinkDB as the backend
+
+First, start `RethinkDB` in the background:
+
+```text
+$ docker-compose up -d rdb
+```
+
+then run the tests using:
+
+```text
+$ docker-compose run --rm bdb-rdb py.test -v
+```
+
 to rebuild all the images (usually you only need to rebuild the `bdb` and
- `bdb-mdb` images).
+ `bdb-rdb` images).
 
 ## Automated Testing of All Pull Requests