Revert "added auto OTR refresh attempt if there is an error decrypting"

This reverts commit 65c3147d8d998931973586a29a7be7b9d41d8c4d.
Better OTR decryption error reporting

report exception backtrace
error injection test mode
Merge pull request #276 from devrandom/otr7

Improved OTR decryption error reporting