In preparation for a release, remove SNAPSHOT dependency

The http.base component has not changed since the last release.
diff --git a/http/jetty/pom.xml b/http/jetty/pom.xml
index 1ca1881..e135277 100644
--- a/http/jetty/pom.xml
+++ b/http/jetty/pom.xml
@@ -262,7 +262,7 @@
         <dependency>
             <groupId>org.apache.felix</groupId>
             <artifactId>org.apache.felix.http.base</artifactId>
-            <version>4.0.9-SNAPSHOT</version>
+            <version>4.0.8</version>
         </dependency>
         <dependency>
             <groupId>commons-fileupload</groupId>