Fix #3995 - Make negative messages less verbose

As an user testing against a large network, I only want to see
good news, not bad news.
Add disclosure date to info
Test #4015, disclosure dates on info
Don't disclose empty disclosure dates

For rapid7#4015
Merge pull request #9 from todb-r7/pr4015-disclosure-fix

Pr4015 disclosure fix
Land #3999, errors on login suppressed by default

This also solved the merge conflict on:

	modules/auxiliary/scanner/http/jenkins_login.rb

Fixes #3995.
Land #4015, dates in the info on modules
Default to TLSv1 for RPC connections
Land #4021, TLSv1 default for RPC connections