Fix for make docker-test
Fix for make docker-test

This patch fixes `make docker-test` so that the sources are properly
initialized inside the container prior to the test.

thecodeteam/rexray,cduchesne/rexray,cduchesne/rexray,cduchesne/rexray,oppodeldoc/rexray,akutz/rexray,oppodeldoc/rexray,thecodeteam/rexray,akutz/rexray,cduchesne/rexray,akutz/rexray,emccode/rexray,emccode/rexray,cduchesne/rexray,cduchesne/rexray,codedellemc/rexray,codedellemc/rexray,thecodeteam/rexray,akutz/rexray,emccode/rexray,codedellemc/rexray,oppodeldoc/rexray,thecodeteam/rexray,emccode/rexray,oppodeldoc/rexray,codedellemc/rexray,codedellemc/rexray,oppodeldoc/rexray,akutz/rexray,akutz/rexray,thecodeteam/rexray,thecodeteam/rexray,oppodeldoc/rexray,codedellemc/rexray