R1:9c9a9a919e7a

Use ApplicationSearch for DrydockLog

Summary: Ref T2015. Move logs over to ApplicationSearch.

Test Plan: Browsed logs in UI.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2015

Differential Revision: https://secure.phabricator.com/D7832