#210 Selenium test minor changes: Logging in setup now works. Finds selenium config now whatever CWD. Moved to testselenium alongside normal tests, instead of in testtools folder - feels better. Added test_ prefix as was thinking of using test sniffer.
Merge branch 'master' of github.com:datagovuk/ckanext-dgu
#198 (not 210 after all): Always shut browser on error. Display exceptions in full to identify position of error. Improve failure printing.