SLING-1658 - switching implementation to logback

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@985979 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 7b4c506..f4d8ae3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -73,6 +73,9 @@
         <integration.test.wait>false</integration.test.wait>
 
         <resources.bundles.path>${project.build.directory}/launchpad-bundles/resources/bundles</resources.bundles.path>
+        
+        <slf4j.version>1.5.11</slf4j.version>
+        <logback.version>0.9.20</logback.version>
     </properties>
 
     <build>
@@ -439,6 +442,10 @@
                     <groupId>org.slf4j</groupId>
                     <artifactId>slf4j-simple</artifactId>
                 </exclusion>
+                <exclusion>
+                    <groupId>log4j</groupId>
+                    <artifactId>log4j</artifactId>
+                </exclusion>
             </exclusions>
         </dependency>
         <dependency>
@@ -449,14 +456,26 @@
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
-            <artifactId>jcl-over-slf4j</artifactId>
-            <version>1.5.2</version>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>1.5.2</version>
+            <artifactId>jcl-over-slf4j</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>log4j-over-slf4j</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>${logback.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>