bump jetty dependency
add a provider for static gets. convert tests to non mock, remove useless test. count != 200 status codes as errors
give each test a separate servlet, fix random failure.
test that we can do 100 concurrent requests. add simple constructor
call send a bit earlier
remove unused method
test only 50 concurrent requests to make sure the tests work on slower systems
Merge remote-tracking branch 'origin/christoph_tests'

Signed-off-by: Mairbek Khadikov <mkhadikov@gmail.com>