remove unused source attributes
Merge pull request #94 from opdemand/remove-source-attributes

remove unused source attributes
Added NTP Client to the packages

We often ran into timing issues in the workflow (e.g. commit, push and git fails with file TS in the future), and
within the architecture as well (logging times off, etc.).

Therefore I added the `ntp` package.

*note*: this is an alternative for #85.
Merge pull request #104 from Springest/ntp-package

Added NTP Client to the packages
optimize docker timeouts for slow connections