Genesis config cleanup (#1812)

* Finish internal ConstantinopleFix->Petersburg transition, including
  class names. Only backwards compatibility and retesteth use of the
  name will remain.
* Remove four unused config fields from json configs.  These are fields
  with no code uses of any sort. All are implied by other fields.
  eip150Hash, eip155Block, eip160Block, and daoForkSupport.
* Remove redundant fork block fields where their value is implied

Signed-off-by: Danno Ferrin <danno.ferrin@gmail.com>

testutil/src/main/resources/fork-chain-data/genesis-outdated.json

@@ -1,11 +1,6 @@
 {
   "config": {
     "chainId": 2018,
-    "homesteadBlock": 0,
-    "daoForkBlock": 0,
-    "eip150Block": 0,
-    "eip155Block": 0,
-    "eip158Block": 0,
     "byzantiumBlock": 0,
     "constantinopleBlock": 5,
     "contractSizeLimit": 2147483647,

testutil/src/main/resources/fork-chain-data/genesis-upgraded.json

@@ -1,14 +1,9 @@
 {
   "config": {
     "chainId": 2018,
-    "homesteadBlock": 0,
-    "daoForkBlock": 0,
-    "eip150Block": 0,
-    "eip155Block": 0,
-    "eip158Block": 0,
     "byzantiumBlock": 0,
     "constantinopleBlock": 5,
-    "constantinopleFixBlock": 7,
+    "petersburgBlock": 7,
     "contractSizeLimit": 2147483647,
     "ethash": {
       "fixeddifficulty": 100

testutil/src/main/resources/mainnet-data/mainnet.json

@@ -3,14 +3,11 @@
     "chainId": 1,
     "homesteadBlock": 1150000,
     "daoForkBlock": 1920000,
-    "daoForkSupport": true,
     "eip150Block": 2463000,
-    "eip150Hash": "0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0",
-    "eip155Block": 2675000,
     "eip158Block": 2675000,
     "byzantiumBlock": 4370000,
     "constantinopleBlock": 7280000,
-    "constantinopleFixBlock": 7280000,
+    "petersburgBlock": 7280000,
     "ethash": {
 
     }