solution: support rinkeby and ropsten testnets

fix: #64

src/test/groovy/io/emeraldpay/dshackle/BlockchainTypeSpec.groovy

@@ -24,7 +24,7 @@ class BlockchainTypeSpec extends Specification {
         expect:
         BlockchainType.fromBlockchain(chain) == BlockchainType.ETHEREUM
         where:
-        chain << [Chain.ETHEREUM, Chain.ETHEREUM_CLASSIC, Chain.TESTNET_KOVAN, Chain.TESTNET_GOERLI, Chain.TESTNET_MORDEN]
+        chain << [Chain.ETHEREUM, Chain.ETHEREUM_CLASSIC, Chain.TESTNET_KOVAN, Chain.TESTNET_GOERLI, Chain.TESTNET_MORDEN, Chain.TESTNET_RINKEBY, Chain.TESTNET_ROPSTEN]
     }
 
     def "Correct type for bitcoin"() {

src/test/groovy/io/emeraldpay/dshackle/config/MainConfigReaderSpec.groovy

@@ -51,7 +51,7 @@ class MainConfigReaderSpec extends Specification {
             port == 8082
             tls != null
             routes != null
-            routes.size() == 4
+            routes.size() == 5
             with(routes[0]) {
                 id == "eth"
                 blockchain == Chain.ETHEREUM
@@ -68,6 +68,10 @@ class MainConfigReaderSpec extends Specification {
                 id == "goerli"
                 blockchain == Chain.TESTNET_GOERLI
             }
+            with(routes[4]) {
+                id == "rinkeby"
+                blockchain == Chain.TESTNET_RINKEBY
+            }
         }
         act.upstreams != null
         with(act.upstreams) {

src/test/groovy/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethodsSpec.groovy

@@ -22,6 +22,8 @@ class DefaultEthereumMethodsSpec extends Specification {
         Chain.ETHEREUM         | '"0x1"'
         Chain.ETHEREUM_CLASSIC | '"0x3d"'
         Chain.TESTNET_KOVAN    | '"0x2a"'
-        Chain.TESTNET_GOERLI    | '"0x5"'
+        Chain.TESTNET_GOERLI   | '"0x5"'
+        Chain.TESTNET_RINKEBY  | '"0x4"'
+        Chain.TESTNET_ROPSTEN  | '"0x3"'
     }
 }

src/test/resources/dshackle-full.yaml

@@ -35,6 +35,8 @@ proxy:
       blockchain: kovan
     - id: goerli
       blockchain: goerli
+    - id: rinkeby
+      blockchain: rinkeby
 
 cluster:
   defaults: