Split setup scripts per database

[guillep]

Today, all jobs are paying a bit the prices of other jobs because we need to make an homogeneous infrastructure to run the tests depending on the platform. For example:

• all osx jobs are taking ~5 minutes because they require updating brew and installing mysql. This happens because osx slaves do not come with mysql installed by default

if [[ $TRAVIS_OS_NAME == "osx" ]]; then brew update > /dev/null && brew install mysql && mysql.server start; fi

• all linux jobs are reinstalling sqlite3 even for non-sqlite jobs

if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
    sudo apt-get autoremove sqlite3;
    sudo apt-add-repository -y ppa:travis-ci/sqlite3;
    sudo apt-get -y update;
    sudo apt-cache show sqlite3;
    sudo apt-get install sqlite3=3.7.15.1-1~travis1;
    sudo sqlite3 -version;
fi;

• all osx jobs are also making a by-hand startup of postgres

if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
    export PG_DATA=$(brew --prefix)/var/postgres;
    rm -rf ${PG_DATA} && initdb ${PG_DATA} -E utf8;
    pg_ctl -w start -l postgres.log --pgdata ${PG_DATA};
    createuser -s postgres;
    cat postgres.log;
fi;

We should make that specific scripts for each database are run for each database. And try to do it outside the .travis.yml file because it starts to get too complicated.