Fixed issues with PostgreSQL Feedback DAO
Modified .travis.yml in order to validate either MySQL DAO and PostgreSQL DAO
Modified mysql scripts (.travis.yml)
Fixed typo in the default postgres user (.travis.yml)
Changes III
(.travis.yml) Modified travis scripts, we change the user postgres user name to 'root', in order
to employ the same users in both MySQL and PostgreSQL.
Solved Configuration Issue in FeedbackConfiguration
Merge commit 'e41eaa58fd' into develop