[Refactoring] Replace std::random_shuffle with Shuffle

std::random_shuffle is deprecated in C++14 and will be removed in C++17

src/bench/bls.cpp

@@ -36,7 +36,7 @@ static void BuildTestVectors(size_t count, size_t invalidCount,
     for (size_t i = 0; i < invalidCount; i++) {
         invalid[i] = true;
     }
-    std::random_shuffle(invalid.begin(), invalid.end());
+    Shuffle(invalid.begin(), invalid.end(), FastRandomContext());
 
     for (size_t i = 0; i < count; i++) {
         secKeys[i].MakeNewKey();

src/test/bls_tests.cpp

@@ -5,6 +5,7 @@
 #include "test/test_pivx.h"
 #include "bls/bls_worker.h"
 #include "bls/bls_wrapper.h"
+#include "random.h"
 
 #include <boost/test/unit_test.hpp>
 
@@ -68,7 +69,7 @@ std::vector<size_t> GetRandomElements(size_t m, size_t n)
     for (size_t i = 0; i < n; i++) {
         idxs.emplace_back(i);
     }
-    std::random_shuffle(idxs.begin(), idxs.end());
+    Shuffle(idxs.begin(), idxs.end(), FastRandomContext());
     return std::vector<size_t>(idxs.begin(), idxs.begin() + m);
 }