Support liquibase.properties files with unknown properties

Description

Currently liquibase will fail with an "unknown property" error if you have a property in your liquibase.properties file it does not recognize.

Add a strict=false flag that will disable that functionality. Allows the command line interface to share a configuration file with other applications.

From pull request https://github.com/liquibase/liquibase/pull/310

Environment

Command line

Reporter

Nathan Voxland

Fix versions

Affects versions

Priority

Major
Configure