Modify jetty max threads

Hi, 

If you run tests on a server with more than 10 CPUs, jetty blocks. MaxThreads must be at least equal to the number of CPU.

starting server
2014-03-28 10:22:40,217 [main            ] [          ] INFO  org.eclipse.jetty.server.Server - jetty-8.1.8.v20121106
LoginService=HashLoginService[null] identityService=org.eclipse.jetty.security.DefaultIdentityService@7907f014
2014-03-28 10:22:40,449 [main            ] [          ] INFO  restx.RestxMainRouterFactory - LOADING MAIN ROUTER
2014-03-28 10:22:40,450 [main            ] [          ] INFO  restx.RestxMainRouterFactory - 
--------------------------------------
 -- RESTX >> LOAD ON REQUEST << >> CLEAN << >> TEST MODE <<
 -- for admin console,
 --   VISIT http://127.0.0.1:43551/api/@/ui/
 --

2014-03-28 10:22:40,547 [main            ] [          ] WARN  o.e.jetty.server.AbstractConnector - insufficient threads configured for SelectChannelConnector@0.0.0.0:43551
server started

---------------------------------------------------------------------------------
>> REQUEST
GET http://127.0.0.1:43551/api/samples (infinite wait)