catchunks: simplify internal options handling

Change-Id: I537a281f6c996c2544c145ab9cc01a54272c8efa
diff --git a/tools/chunks/catchunks/pipeline-interests-aimd.cpp b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
index e32a36d..667bd9e 100644
--- a/tools/chunks/catchunks/pipeline-interests-aimd.cpp
+++ b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
@@ -34,11 +34,11 @@
 namespace chunks {
 
 PipelineInterestsAimd::PipelineInterestsAimd(Face& face, RttEstimatorWithStats& rttEstimator,
-                                             const Options& options)
-  : PipelineInterestsAdaptive(face, rttEstimator, options)
+                                             const Options& opts)
+  : PipelineInterestsAdaptive(face, rttEstimator, opts)
 {
-  if (options.isVerbose) {
-    std::cerr << options;
+  if (m_options.isVerbose) {
+    printOptions();
   }
 }