Old references in org.openhab.io.jetty.certificate bundle

[dvanherbergen]

When starting in debug mode, the following two errors show up:

2015-12-16 13:54:12.971 [DEBUG] [org.openhab.io.jetty.certificate] - FrameworkEvent INFO - org.openhab.io.jetty.certificate
org.osgi.framework.BundleException: The bundle class path entry "lib/bcpkix-jdk15on-1.52.jar" could not be found for the bundle "osgi.identity; osgi.identity="org.openhab.io.jetty.certificate"; type="osgi.bundle"; version:Version="2.0.0.201512161118"; singleton:="true""
...
2015-12-16 13:54:12.977 [DEBUG] [org.openhab.io.jetty.certificate] - FrameworkEvent INFO - org.openhab.io.jetty.certificate
org.osgi.framework.BundleException: The bundle class path entry "lib/bcprov-jdk15on-1.52.jar" could not be found for the bundle "osgi.identity; osgi.identity="org.openhab.io.jetty.certificate"; type="osgi.bundle"; version:Version="2.0.0.201512161118"; singleton:="true""

The references to the bouncy castle jars in the manifest of the jetty.certificate bundle should be removed. They are no longer necessary as the code is embedded directly in the jar using the maven shade plugin.

[kaikreuzer]

Makes sense. Will you create a PR?