Remove @RequestScoped from AtmosphereJerseyServletModule

This patch removes @RequestScoped annotations from
AtmosphereJerseyServletModule to avoid the following errors:

2014.06.20 11:37:53.219 ERROR [] ThrowableMapper -  Encountered uncaught exception:
com.google.inject.ProvisionException: Guice provision errors:

1) Error in custom provider, com.google.inject.OutOfScopeException:
Cannot access scoped object. Either we are not currently inside an HTTP
Servlet request, or you may have forgotten to apply
com.google.inject.servlet.GuiceFilter as a servlet filter for this
request.
...

Signed-off-by: Taku Fukushima <tfukushima@midokura.com>