puppet: install ttf-dejavu package to fix java headless issue

Jenkins/Java with OpenJDK might complain about:

| "Caused by: java.lang.Error: Probable fatal error:No fonts found."

and e.g. the "Test Result Trend" graphics are missing then.

Might also require:

  JAVA_ARGS="-Djava.awt.headless=true"

inside /etc/default/jenkins. The latest Jenkins packages
already include this, but it's missing in the LTS releases
currently, jftr.
puppet: install timestamper plugin

Every Jenkins system should have this plugin present,
so let's go for it.
build-and-provide-package: use -b for package builds that shouldn't include sources

See dpkg-buildpackage(1):

| -b  Specifies a binary-only build, no source files are to be built and/or distributed. Passed to dpkg-genchanges.

 vs.

| -B  Specifies a binary-only build, limited to architecture dependent packages.  Passed to dpkg-genchanges.

We don't want to skip the architecture dependent packages but
just don't want to include sources in all the package builds
(since the sources can be included via reprepro in the repository
just *once*).

Thanks: alexander (user systemstart on github) for testing and feedback
Merge remote-tracking branch 'origin/pr/83'

https://github.com/mika/jenkins-debian-glue/pull/83
Bump Standards-Version to 3.9.5
Release new version 0.8.0