move to elastic-recheck web console in share

this provides the changes needed to handle the new elastic-recheck
web console installed from the elastic-recheck package in the
share tree.

factor out bot code to elastic_recheck::bot

this change moves elastic_recheck bot starting code out into
a separate module, which lets us include all the elastic_recheck
base module into the static site config.

Change-Id: If53523754494a746c152c5d1384db5426b096fc1
Merge "move to elastic-recheck web console in share"