SLING-11215 Upgrade Karaf to 4.4

use Karaf 4.4.3
diff --git a/pom.xml b/pom.xml
index dbb0908..550b67a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@
       <groupId>org.apache.karaf</groupId>
       <artifactId>apache-karaf</artifactId>
       <type>tar.gz</type>
-      <version>4.4.2</version>
+      <version>4.4.3</version>
       <scope>test</scope>
       <exclusions>
         <exclusion>