[tests] Use FastRandomContext in scheduler_tests.cpp

instead of boost::random::{mt19937,uniform_int_distribution}

src/test/scheduler_tests.cpp

@@ -10,8 +10,6 @@
 #include "config/pivx-config.h"
 #endif
 
-#include <boost/random/mersenne_twister.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
 #include <boost/thread.hpp>
 #include <boost/test/unit_test.hpp>
 
@@ -46,10 +44,10 @@ BOOST_AUTO_TEST_CASE(manythreads)
 
     boost::mutex counterMutex[10];
     int counter[10] = { 0 };
-    boost::random::mt19937 rng(42);
-    boost::random::uniform_int_distribution<> zeroToNine(0, 9);
-    boost::random::uniform_int_distribution<> randomMsec(-11, 1000);
-    boost::random::uniform_int_distribution<> randomDelta(-1000, 1000);
+    FastRandomContext rng(42);
+    auto zeroToNine = [](FastRandomContext& rc) -> int { return rc.randrange(10); }; // [0, 9]
+    auto randomMsec = [](FastRandomContext& rc) -> int { return -11 + rc.randrange(1012); }; // [-11, 1000]
+    auto randomDelta = [](FastRandomContext& rc) -> int { return -1000 + rc.randrange(2001); }; // [-1000, 1000]
 
     std::chrono::system_clock::time_point start = std::chrono::system_clock::now();
     std::chrono::system_clock::time_point now = start;