Align tests target name prefix with plugin name

Change-Id: Ia6cd289280b7b2fdf46ca49ccb0dd1485edd56a4
diff --git a/BUILD b/BUILD
index 3545a67..45abbef 100644
--- a/BUILD
+++ b/BUILD
@@ -20,7 +20,7 @@
 )
 
 junit_tests(
-    name = "go_import_tests",
+    name = "go-import_tests",
     testonly = 1,
     srcs = glob(["src/test/java/**/*.java"]),
     tags = ["go-import"],