Refactor buck external dependencies

Change-Id: Ia4b99493407eb7d4e893804cba6b944f758f085e
diff --git a/protocols/p4runtime/ctl/BUCK b/protocols/p4runtime/ctl/BUCK
index e4a90e7..899a1ff 100644
--- a/protocols/p4runtime/ctl/BUCK
+++ b/protocols/p4runtime/ctl/BUCK
@@ -13,10 +13,11 @@
 
 TEST_DEPS = [
     '//lib:TEST',
+    '//lib:minimal-json',
     '//incubator/bmv2/model:onos-incubator-bmv2-model',
 ]
 
 osgi_jar_with_tests(
     deps = COMPILE_DEPS,
     test_deps = TEST_DEPS,
-)
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+)