Use COINBASE_MATURITY constant in functional tests.

test/functional/feature_loadblock.py

@@ -16,6 +16,7 @@ import sys
 import tempfile
 import urllib
 
+from test_framework.blocktools import COINBASE_MATURITY
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 
@@ -28,7 +29,7 @@ class LoadblockTest(BitcoinTestFramework):
 
     def run_test(self):
         self.nodes[1].setnetworkactive(state=False)
-        self.nodes[0].generate(100)
+        self.nodes[0].generate(COINBASE_MATURITY)
 
         # Parsing the url of our node to get settings for config file
         data_dir = self.nodes[0].datadir