Update slingstart maven plugin to 1.7.0 in all projects to avoid build problems using the reactor

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1776436 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index ec5193e..7fc0acf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,7 @@
             <plugin>
                 <groupId>org.apache.sling</groupId>
                 <artifactId>slingstart-maven-plugin</artifactId>
-                <version>1.2.0</version>
+                <version>1.7.0</version>
                 <extensions>true</extensions>
             </plugin>
         </plugins>