Change ps command to show more data to match.

ps -e doesn't show enough data to match if the process name doesn't exactly match - this shows more data.

For example:

    describe 'jetty' do
      it { should be_enabled }
      it { should be_running }
    end

It shows as being enabled but it never shows as running because it's running under Java. This is the command for jetty:

    /usr/bin/java -Dsolr.solr.home=/opt/solr -Djetty.port=8085 -Djetty.home=/opt/jetty -Djava.io.tmpdir=/tmp -jar /opt/jetty/start.jar --pre=etc/jetty-logging.xml --daemon

I'm not sure how cross platform this change is.