Add RSKIP529 as part of Reed 8.1.0

Author: marcos-iov

rskj-core/src/main/resources/reference.conf

@@ -95,7 +95,7 @@ blockchain = {
             rskip460 = lovell700
             rskip502 = reed810
             rskip516 = reed800
-            rskip529 = vetiver900
+            rskip529 = reed810
         }
     }
     gc = {

rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java

@@ -139,7 +139,7 @@ class ActivationConfigTest {
         "    rskip460: lovell700",
         "    rskip502: reed810",
         "    rskip516: reed800",
-        "    rskip529: vetiver900",
+        "    rskip529: reed810",
         "}"
     ));