[FIXED JENKINS-16849] don't trigger MailAddressResolver invocation
use hasExplicitlyConfiguredAddress (1.448) to check MailerProperty is set
missing indirection in BuildChooser#prevBuildForChangelog overrides
[FIXED JENKINS-16914] fetch by URL, not by remote alias (that may not be set)
Expand reference repo
Merge pull request #137 from blatinville/ExpandReferenceRepo

Expand reference repo