Update wro4j to run in Eclipse

spring-cloud-netflix-eureka-server/pom.xml

@@ -100,6 +100,7 @@
 				<artifactId>maven-resources-plugin</artifactId>
 				<executions>
 					<execution>
+						<!-- Serves *only* to filter the wro.xml so it can get an absolute path for the project -->
 						<id>copy-resources</id>
 						<phase>validate</phase>
 						<goals>
@@ -134,6 +135,7 @@
 					<cssDestinationFolder>${project.build.directory}/generated-resources/static/eureka/css</cssDestinationFolder>
 					<wroFile>${project.build.directory}/wro/wro.xml</wroFile>
 					<extraConfigFile>${basedir}/src/main/wro/wro.properties</extraConfigFile>
+					<contextFolder>${basedir}/src/main/wro</contextFolder>
 				</configuration>
 			</plugin>
 		</plugins>