GH-2687 - Remove -Werror switch.

Will require a bit more diligence checking the looks, but it helps the Spring Data team and closes #2687.

Author: michael-simons

pom.xml

@@ -711,7 +711,6 @@
 						<configuration combine.self="append">
 							<compilerArgs>
 								<arg>-Xlint:all,-options,-path</arg>
-								<arg>-Werror</arg>
 							</compilerArgs>
 						</configuration>
 					</execution>