Add sonatype-oss-snapshot for Loxigen

Change-Id: If9e1ddaeea255d2cae556df5cc238cb19b8733a6

@@ -16,6 +16,18 @@
 
     <description>ONOS OpenFlow controller subsystem API</description>
 
+    <repositories>
+        <!-- FIXME: for Loxigen. Decide how to use Loxigen before release. -->
+        <repository>
+            <id>sonatype-oss-snapshot</id>
+            <name>Sonatype OSS snapshot repository</name>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+        </repository>
+    </repositories>
+
     <dependencies>
         <dependency>
             <groupId>org.projectfloodlight</groupId>