scripted-diff: [test] Use g_rng/m_rng directly

-BEGIN VERIFY SCRIPT-

 # Use m_rng in unit test files
 ren() { sed -i "s:\<$1\>:$2:g" $( git grep -l "$1" src/test/*.cpp src/wallet/test/*.cpp src/test/util/setup_common.cpp ) ; }
 ren InsecureRand32                m_rng.rand32
 ren InsecureRand256               m_rng.rand256
 ren InsecureRandBits              m_rng.randbits
 ren InsecureRandRange             m_rng.randrange
 ren InsecureRandBool              m_rng.randbool
 ren g_insecure_rand_ctx           m_rng
 ren g_insecure_rand_ctx_temp_path g_rng_temp_path

-END VERIFY SCRIPT-

src/test/bloom_tests.cpp

@@ -463,7 +463,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_4_test_update_none)
 
 std::vector<unsigned char> BloomTest::RandomData()
 {
-    uint256 r = InsecureRand256();
+    uint256 r = m_rng.rand256();
     return std::vector<unsigned char>(r.begin(), r.end());
 }