add this.removeAllListeners('connection-error') (#2323)
add this.removeAllListeners('connection-error') (#2323)

* add this.removeAllListeners('connection-error')

fixes #2312

add update some arrow functions

* remove extra semicolon

haraka/Haraka,msimerson/Haraka,smfreegard/Haraka,smfreegard/Haraka,haraka/Haraka,msimerson/Haraka,msimerson/Haraka,haraka/Haraka,smfreegard/Haraka,haraka/Haraka,smfreegard/Haraka,msimerson/Haraka