WL-3444 : NPE check
WL-3444 : no need to look up a constant
WL-3444 : stash site ID in session and use that to get siteupdaters
WL-3444 : Contact Us tool SQL in contact us submodule so self-contained
WL-3444 : add a depends-on attribute so that SiteService.init() runs first
WL-3444 : Add comment as not obvious
Merge pull request #19 from ox-it/WL-3444

WL-3444 : Contact Us tool