Do not commit upates to the index immediately

Have Solr figure out when to actually commit TTM related updates to the
index. Just specify it needs to happen within 5,000 milliseconds. This
will ensure that TTM update jobs no longer block on Solr updates.

Bug: 48164
Change-Id: I8a54e5dd00d6e6298e59000b8bdeaf4135d3158a