Waiting for java services to stop in init scripts before continuing

https://github.com/corey-hammerton/graylog2-rpms/issues/7

Files Modified:
SOURCES/init.d-graylog2-radio
SOURCES/init.d-graylog2-server
SOURCES/init.d-graylog2-web-interface
SPECS/graylog2-radio.spec
SPECS/graylog2-server.spec
SPECS/graylog2-web-interface.spec

In the stop function of all init script sources waiting for the
services to finish shutdown before continuing. This wait by
testing if a directory exists under /proc/ with the name equal to
the PID file value, if found waits for 1 second before testing
again.

Updating all SPEC files with a new release number and an added
changelog entry with this update.