Refactor buck external dependencies

Change-Id: Ia4b99493407eb7d4e893804cba6b944f758f085e
diff --git a/apps/p4runtime-test/BUCK b/apps/p4runtime-test/BUCK
index 3ba5b5e..c91aced 100644
--- a/apps/p4runtime-test/BUCK
+++ b/apps/p4runtime-test/BUCK
@@ -36,9 +36,10 @@
     '//lib:netty-transport',
     '//lib:netty-transport-native-epoll',
     '//lib:netty-resolver',
+    '//lib:minimal-json',
 ]
 
 osgi_jar_with_tests(
     deps = COMPILE_DEPS,
     test_deps = TEST_DEPS,
-)
\ No newline at end of file
+)