Merge branch 'release/0.4.0' into develop
bump to next -develop version
remove rspec-hiera-puppet due to brokenness
add more builds to build-matrix
fix allowed_failures config
bump scl submodule to v2.3.0

Among other changes this drops support for syslog-ng 3.2 and adds support for syslog-ng 3.4.
update readme

bump syslog-ng version to 3.4 and document new logpaths offered by the module
thanks to bumping the upstream scl config.
Merge branch 'feature/syslog-ng-3.4-bump' into develop
update changelog and bump version in modulefile
Merge branch 'release/0.5.0'