This is a minor bug fix release over 1.7.0. See below for the list of fixes.
There are no database changes between 1.7.1 and 1.7.0, it is fully backwards and forwards compatible.
OpenMRS 1.7.1 represents OpenMRS 18.104.22.16874
This module is bundled with 1.7.1 and is marked as a core module (http://). It can be upgraded, but cannot be removed:
These modules are bundled with the 1.7.1 openmrs.war download. They will be started automatically and can be removed if they are not wanted.
(taken from listing of tickets closed for 1.7.1: http://tickets.openmrs.org/secure/ReleaseNote.jspa?version=13114&projectId=10000)