Update chainparams.cpp

Update a wrong nMasternodeCollateralLimit
Now is correct

Author: BitBlocksProject

src/chainparams.cpp

@@ -192,7 +192,7 @@ class CTestNetParams : public CMainParams
         nLastPOWBlock = 200;
         nMaturity = 15;
         nMasternodeCountDrift = 4;
-        nMasternodeCollateralLimit = 1000;
+        nMasternodeCollateralLimit = 30000;
         nModifierUpdateBlock = 51197; //approx Mon, 17 Apr 2017 04:00:00 GMT
         nMaxMoneyOut = 43199500 * COIN;