Instead of removing the tests for validating _Session triggers, I restored them and made sure that having a _Session trigger does NOT throw an exception

…t and new object into one REST array and then convert to ParseObject. Previously, it would convert the extraData and original object into a ParseObject and copy data from new array over. This has the side effect of failing for _Session class because the attributes are read only.

Rename sanitizedData to sanitizeData because sanitizedData implies the data will be returned. Instead, sanitizeData mutates the data field to remove any sensitive information.

Create expandData function which mutates the data field and expands any keys that use dot notation ('x.y')

…changes since they wouldn't work

…allow-session-triggers