(SERVER-1741) Bump tk-ws-jetty9 to 2.0.0
(SERVER-1741) Bump tk-ws-jetty9 to 2.0.0

This commit upgrades trapperkeeper-webserver-jetty9 in order to pick up
fixes we need in Jetty 9.4.

rlinehan/puppet-server,shrug/puppet-server,puppetlabs/puppet-server,er0ck/puppetserver,shrug/puppet-server,puppetlabs/puppetserver,puppetlabs/puppetserver,rlinehan/puppetserver,er0ck/puppetserver,camlow325/puppet-server,camlow325/puppetserver,shrug/puppet-server,camlow325/puppetserver,rlinehan/puppet-server,rlinehan/puppetserver,camlow325/puppetserver,rlinehan/puppetserver,puppetlabs/puppet-server,shrug/puppet-server,puppetlabs/puppet-server,camlow325/puppet-server,er0ck/puppetserver,rlinehan/puppetserver,rlinehan/puppet-server,er0ck/puppetserver,puppetlabs/puppetserver,camlow325/puppet-server,puppetlabs/puppetserver,camlow325/puppetserver