Add Tests executions during CI builds

We should consider executing the tests during the build phase.

(Several tests were added with MR !41 (merged) that added db persistence for the Vault)

mentioned in merge request !42 (merged)

changed the description

changed milestone to %v0.4.0

assigned to @moul

mentioned in commit 5e610ba2

mentioned in commit 5dd41657

closed with merge request !42 (merged)