Exclude slf4j from Apache Directory dependency.
<groupId>org.apache.directory.api</groupId>
<artifactId>api-all</artifactId>
<version>2.0.0.AM2</version>
+ <exclusions>
+ <exclusion>
+ <groupId>org.slf4j</groupId>
+ <artifactId>slf4j-api</artifactId>
+ </exclusion>
+ </exclusions>
</dependency>
<!-- Guice -->
