Update API tests
Set email in lowercase when building the certificate url
Disable the option to create PR or Q if an AA was created
Fix date handling when creating an AssetAvailability

When a new AssetAvailability is created, the dates on the form are set to the
dates of the new AssetAvailability. No more comprobations are done about
whether #asset-availability-tab or #asset-availability are active or hidden to
determine if the dates of the availability should be changed.
Merge remote-tracking branch 'origin/master' into feature-assets
Added a new modal window for operation confirmations related to AA