Improve log

Log to console

Mixed brach with NewLoggers + New Retry policy

New Logger
New Retry policy behaviour
New Trace forced log on the air
Removed winston dependency
Performance increased

Prepro FS

Merge pull request #191 from telefonicaid/maxRetryTime

Max retry time

Improve testing

Improve some tests about proxy feature

Bug fixes and some new functions

• Test for High Availability
• Target Certificate: certificates can be added to connect securely with HTTPS servers.
• Extra headers: additional headers can be included using the X-relayer-header header. Check wiki in order to learn how it works. (https://github.com/telefonicaid/Rush/wiki/Detailed-header-view#header)
• Bug fixes

Sync logger release

v1.6.1

Set logger release at package.json

v1.6

Bugfix: replace log by logger