* stable-2.16:
Set version to 2.15.14-SNAPSHOT
Upgrade JGit to 5.1.7.201904200442-r
Set version to 2.15.13
SitePathInitializer: Add missing "AddKeyHtml.soy"
Upgrade JGit to 4.9.10.201904181027-r
Convert http links to https
Change-Id: I4033d3abcded7892e7a0e3c7e019a214c48cec7a