Replacing Spring Bundler with maven-bundle-plugin

This update replaces bundlor with standard Maven plugin for OSGi support.

I've tried to keep manifest more or less the same, yet there are a few differences (bugfixes) - bundlor exported packages that are not used in runtime, e.g. edu.umd.cs.findbugs.annotations and also some versions were set to 0 incorrectly with bundlor.