Make feeEstimator its own global instance of CBlockPolicyEstimator

src/test/policyestimator_tests.cpp

@@ -16,7 +16,8 @@ BOOST_FIXTURE_TEST_SUITE(policyestimator_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(BlockPolicyEstimates)
 {
-    CTxMemPool mpool;
+    CBlockPolicyEstimator feeEst;
+    CTxMemPool mpool(&feeEst);
     TestMemPoolEntryHelper entry;
     CAmount basefee(2000);
     CAmount deltaFee(100);