fix pending test form_validation_errors_spec
wait for javascript to be loaded after visiting each page in postcode_picker_spec
attempt to fix intermittent failures in postcode_picker_spec by sleeping after clicking Find Address in order to give time for the dom to be populated with the addresses
un pend tests
Added sleep to make javascript tests pass
Merge pull request #499 from ministryofjustice/pendingtests

fix pending test form_validation_errors_spec
Merge branch 'master' into header_copy_change