SLING-7253 Upgrade Karaf to 4.2

use Karaf 4.2.0
diff --git a/pom.xml b/pom.xml
index 478a027..f031044 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,13 +47,13 @@
     <dependency>
       <groupId>org.apache.karaf.features</groupId>
       <artifactId>framework</artifactId>
-      <version>4.2.0.M2</version>
+      <version>4.2.0</version>
       <type>kar</type>
     </dependency>
     <dependency>
       <groupId>org.apache.karaf.features</groupId>
       <artifactId>standard</artifactId>
-      <version>4.2.0.M2</version>
+      <version>4.2.0</version>
       <classifier>features</classifier>
       <type>xml</type>
       <scope>runtime</scope>
@@ -61,7 +61,7 @@
     <dependency>
       <groupId>org.apache.karaf.features</groupId>
       <artifactId>enterprise</artifactId>
-      <version>4.2.0.M2</version>
+      <version>4.2.0</version>
       <classifier>features</classifier>
       <type>xml</type>
       <scope>runtime</scope>
@@ -390,7 +390,7 @@
       <plugin>
         <groupId>org.apache.karaf.tooling</groupId>
         <artifactId>karaf-maven-plugin</artifactId>
-        <version>4.2.0.M2</version>
+        <version>4.2.0</version>
         <extensions>true</extensions>
         <executions>
           <execution>