testing infrastructure

* http.bin rack (start service, teardown service, response and request
cookies dump)
* selenium testcase (start/stop driver on class level, url defaulting)
TestCase level httpbin config
setup cookies by server
dump cookies fix
rename bin config attribute name
browser options case level config
httpbin tests
more bin urls
expire domain and pathh cookie validation tests
secure test
removed garbage
typo fix
typo fix
json dump fix
httponly and secure test fixes
client setted up cookie test
client cookies setup
templates
fixes
Merge branch 'feature/setup-cookie-pages' into develop