m2e fails to execute wro4j plugin - m2eclipse

Question

I would like to use wro4j maven plugin in a project. I works using mvn command line, but not in Eclipse/m2e.
I tried both lifecycle-mapping customization, and wroj4j-m2e integration plugin.
Here is the error with lifecycle-mapping customization :
Execution default of goal ro.isdc.wro4j:wro4j-maven-plugin:1.6.0:run failed: Plugin ro.isdc.wro4j:wro4j-maven-plugin:1.6.0 or one of its dependencies could not be resolved: Failed to collect dependencies for ro.isdc.wro4j:wro4j-maven-plugin:jar:1.6.0 () (ro.isdc.wro4j:wro4j-maven-plugin:1.6.0:run:default:process-resources)
The log of m2eclipse (in .plugins\org.eclipse.m2e.logback.configuration) is empty about this error, even with debug output selected in Eclipse maven preferences.
m2e version : 1.2.0.20120903-1050
eclipse version : Juno Service Release 1
Here is the pom.xml (extract)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>test-maven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<wro4j.version>1.6.0</wro4j.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>ro.isdc.wro4j</groupId>
<artifactId>wro4j-maven-plugin</artifactId>
<version>${wro4j.version}</version>
<executions>
<execution>
<configuration>
<destinationFolder>${project.build.directory}/</destinationFolder>
<wroManagerFactory>ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory</wroManagerFactory>
<wroFile>${basedir}/src/main/config/wro.xml</wroFile>
<extraConfigFile>${basedir}/src/main/config/wro.properties</extraConfigFile>
<targetGroups>gss</targetGroups>
<cssDestinationFolder>${project.build.directory}/${project.build.finalName}/styles/</cssDestinationFolder>
<jsDestinationFolder>${project.build.directory}/${project.build.finalName}/scripts/</jsDestinationFolder>
<contextFolder>${basedir}/src/main/</contextFolder>
<ignoreMissingResources>false</ignoreMissingResources>
<wroFile>${basedir}/src/main/config/wro.xml</wroFile>
</configuration>
<phase>process-resources</phase>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
<!-- configure #!# m2eclipse -->
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>ro.isdc.wro4j</groupId>
<artifactId>wro4j-maven-plugin</artifactId>
<versionRange>[1.0,]</versionRange>
<goals>
<goal>run</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute>
<runOnIncremental>true</runOnIncremental>
</execute>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>