Changes to handle missing pool genesis txn file by showing proper message to user.
Changes to handle missing pool genesis txn file by showing proper message to user.

* update help message for 'missing genesis txns file'

* Revert "update help message for 'missing genesis txns file'"

This reverts commit 4b15c4b8641263646be7122f7a9355f6f5ed7b19.

* update help message for 'missing genesis txns file'

evernym/zeno,evernym/plenum