timestamped snapshot are cleaned up on apache repo so definitely not to use

Signed-off-by: olivier lamy <oliver.lamy@gmail.com>

jetty-home/etc/infinispan-embedded.xml

@@ -1,5 +0,0 @@
-<infinispan>
-   <cache-container default-cache="jetty-sessions">
-      <local-cache name="jetty-sessions"/>
-   </cache-container>
-</infinispan>

pom.xml

@@ -517,7 +517,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-invoker-plugin</artifactId>
-          <version>3.2.1-20190725.112516-11</version>
+          <version>3.2.1-SNAPSHOT</version>
           <configuration>
             <writeJunitReport>true</writeJunitReport>
             <junitPackageName>org.eclipse.jetty.maven.its</junitPackageName>