Update the it tests for the installer to the latest core 3.8.7-SNAPSHOT version

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1783405 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 7dc05c2..3f2925e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
     </parent>
 
     <artifactId>org.apache.sling.installer.it</artifactId>
-    <version>3.8.3-SNAPSHOT</version>
+    <version>3.8.7-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>Apache Sling Installer Integration Tests</name>