Source File Upload Tests

Add Uploaded source files testing. Handles success and error case.
Exception located in error cases, these tests are expect fail.
Added a 'Critical Error' check to BasePage and some hard defaults
for the document storage dir.
Added an action to delete the stored files on database reset.
Slight modification of ids in Source Documents pages.
Add too-large upload file test

Test for files that are too large to upload.
Fix up code review issues in Source Upload testing

Mostly blank lines and readbility.
Update UploadTest on review comments

Don't use globals for elements that may not exist.
Clear cached data between functions.
Wrong licence year.
Also added a test step for verifying the file is saved to the intended
location.