Work-around for version check until the version strategy is determined

[janette]

Fixes #2537

QA

When on the Available Updates page, you should not see

* Warning: Invalid argument supplied for foreach() in theme_update_report() (line 53 of /var/www/docroot/modules/update/update.report.inc).
* Warning: sort() expects parameter 1 to be array, null given in theme_update_report() (line 182 of /var/www/docroot/modules/update/update.report.inc).
* Warning: implode(): Invalid arguments passed in theme_update_report() (line 193 of /var/www/docroot/modules/update/update.report.inc).

[dafeder]

@janette I don't see the error messages you mention in the QA steps, but now I do see this after running cron and at the top of the module updates page:

Notice: Undefined index: dkan in dkan_sitewide_update_status_alter() (line 206 of /var/www/dkan/modules/dkan/dkan_sitewide/dkan_sitewide.module).

[dafeder]

BTW the Pantheon install is still failing, but when I run the install locally I also get that error at the very end of the GUI install.