Unit tests for SimpleCAS/CMS uploads

[vanstyn]

Using RapidApp::Test, unit tests need to be written to confirm operation of file/image uploads:

• Uploading a normal file and getting back link
• Access the uploaded file via that link
• Uploading an image and getting back link+meta data info (height/width)
• Uploading an image that is larger than max size and getting back warning and resized details