fix(mu): duplicate From-Process tags on transactions

[VinceJuliano]

Either Messages coming in from users and coming out of process results have been reported to have duplicate From-Process tags there should only be one on each message. We should check both.

Tags in the MU are added in the build-tx.js function. It may be that these duplicates are coming from aoconnect though and not the MU.

[jfrain99]

Build-tx is already filtering out duplicate From-Process tags, since it is manually assigned the fromProcessId. Added a test to ensure duplicate input From-Process tags results in one output From-Process tags.
Connect sends duplicates if specified by user - could be patched, but seems to be non-issue.