Revert "Revert "travis-ci: use container based building""
Revert "Revert "travis-ci: use container based building""

This reverts commit 52e7e653da97f03835af2d1331ff96e600afa843.

libpam0g-dev is the correct name. libpam-dev is virtual package
in ubuntu.

rmbreak/pam_ldapdb