[ONOS-721, ONOS-447] Add org.osgi.core dependency to pom.xml. Fixes eclipse build issue

Change-Id: I8bfbc1e33326c1b23cafd3f82f129a708a5e9985
(cherry picked from commit a65f6218426e44f1560ced55b7e7c30f56f1f050)
diff --git a/providers/host/pom.xml b/providers/host/pom.xml
index d8ea93d..56e9aa9 100644
--- a/providers/host/pom.xml
+++ b/providers/host/pom.xml
@@ -39,6 +39,10 @@
         </dependency>
         <dependency>
             <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.osgi</groupId>
             <artifactId>org.osgi.compendium</artifactId>
         </dependency>
         <dependency>