minor fix to karaf wiring to fix build problem

without this it complains karaf wants annotation-api 1.3.1 whereas we pull in 1.3.2
diff --git a/ui-modules/features/pom.xml b/ui-modules/features/pom.xml
index 0545017..ac37cc0 100644
--- a/ui-modules/features/pom.xml
+++ b/ui-modules/features/pom.xml
@@ -37,6 +37,13 @@
             <groupId>org.apache.karaf.features</groupId>
             <artifactId>framework</artifactId>
             <type>kar</type>
+            <exclusions>
+                <!-- pulled in below at our preferred version (more recent) -->
+                <exclusion>
+                    <groupId>javax.annotation</groupId>
+                    <artifactId>javax.annotation-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.apache.karaf.features</groupId>