fs: fix crash setting xattr on a root

Change-Id: I76f008bcffcf23c5936a0a16cabb9c5b7c9bbd99
Trial fix for infinite piggie bug.

Change-Id: I589c1c6dd8d68552376f274c9bcb091fc6a289f3
Add SearchSession#refreshIfNecessary() - use to do manual refreshes when websocket not avaialble.

Change-Id: Icb451ddff8fc6917f837f289f1b0f83fa7cc5d81
Merge "Trial fix for infinite piggie bug."
Merge "Add SearchSession#refreshIfNecessary() - use to do manual refreshes when websocket not avaialble."
Merge "fs: fix crash setting xattr on a root"
replica: change receive strategy, fixing a TODO, and start of tests

Change-Id: I74c1206ce4bb34ddffe2601cf95fce393116c303