Replaced ServiceTracker by Declarative Service references

fixes #228
Fixing invalid if-clause

fixes #227
Preparing the release branch for 3.1.6
[maven-release-plugin] prepare release 3.1.6
Moved the health check out of the spring security filter chain into the regular set of filters
Fixes condition in cases where allof but not oneof is defined

Closes #226
Adjusted cache key for action pools to include the site

Closes #238
Started development and release of 3.1.7
[maven-release-plugin] prepare release 3.1.7
Preparing for development on version 3.1.8
Fixed rank of health check in the filter chain
Preparing the official release of 3.1.6
[maven-release-plugin] prepare release 3.1.6
Preparing for the development of 3.1.7
Added supporting libraries for apache poi
Preparing another 3.1.6
[maven-release-plugin] prepare release 3.1.6
[maven-release-plugin] rollback changes from release preparation of 3.1.6
Fixed formatting of POM file
Cleanup of lib/local and corresponding dependencies