Fix: resolve ovsdb-base activation issue caused by incorrect deps

Change-Id: I77581beab6f7eddae8bf65093c3618d648765f76
diff --git a/providers/ovsdb/base/BUILD b/providers/ovsdb/base/BUILD
index c1f23a3..da704c9 100644
--- a/providers/ovsdb/base/BUILD
+++ b/providers/ovsdb/base/BUILD
@@ -11,6 +11,7 @@
     category = "Provider",
     description = "ONOS OVSDB provider.",
     included_bundles = BUNDLES,
+    required_apps = ["org.onosproject.tunnel"],
     title = "OVSDB Provider",
     url = "http://onosproject.org",
 )