Properly mark Selenium tests as skipped if not configured

Signed-off-by: Michal Čihař <michal@cihar.com>
Use single variable for server URL

Signed-off-by: Michal Čihař <michal@cihar.com>
Honor configured database server

Signed-off-by: Michal Čihař <michal@cihar.com>
Remove unused code

Signed-off-by: Michal Čihař <michal@cihar.com>
Allow to configure Selenium server manually

Signed-off-by: Michal Čihař <michal@cihar.com>
Unify handling of environment configuration of testsuite

Signed-off-by: Michal Čihař <michal@cihar.com>
Make readme show in rst on github

Signed-off-by: Michal Čihař <michal@cihar.com>
Remove obsolete readme

Signed-off-by: Michal Čihař <michal@cihar.com>