Update soy and gitiles-servlet to recent versions
Update soy and gitiles-servlet to recent versions

Upgrade guice multibindings to match version used by Gerrit. Package
JSR305 annotation, because closure-templates depends on it but Gerrit
doesn't package it anymore, as it was replaced by own class, not to
interfere with J2EE containers, in [1].

Prettify server side syntax highlighting library must also be included
in plugin artifact.

[1] https://gerrit-review.googlesource.com/50112

Change-Id: I8f5fbdff0c45d3fc36e11314b27d83ae3f157a36

GerritCodeReview/plugins_gitiles