increased database pool size on Travis CI
increased database pool size on Travis CI

torpedro/codeocean,openHPI/codeocean,flxw/codeocean,flxw/codeocean,openHPI/codeocean,flxw/codeocean,openHPI/codeocean,openHPI/codeocean,torpedro/codeocean,openHPI/codeocean,torpedro/codeocean,flxw/codeocean,torpedro/codeocean,torpedro/codeocean,openHPI/codeocean,flxw/codeocean