Enable the Beta RPC API (v2) for all unit tests: (#4573)

* Enable api_version 2, which is currently in beta. It is expected to be
  marked stable by the next stable release.
* This does not change any defaults.
* The only existing tests changed were one that set the same flag, which
  was now redundant, and a couple that tested versioning explicitly.

src/test/jtx/impl/envconfig.cpp

@@ -49,6 +49,9 @@ setupConfigForUnitTests(Config& cfg)
     cfg.FEES.account_reserve = XRP(200).value().xrp().drops();
     cfg.FEES.owner_reserve = XRP(50).value().xrp().drops();
 
+    // The Beta API (currently v2) is always available to tests
+    cfg.BETA_RPC_API = true;
+
     cfg.overwrite(ConfigSection::nodeDatabase(), "type", "rwdb");
     cfg.overwrite(ConfigSection::nodeDatabase(), "path", "main");
     cfg.overwrite(SECTION_RELATIONAL_DB, "backend", "rwdb");

src/test/rpc/AccountInfo_test.cpp

@@ -206,10 +206,7 @@ public:
     testSignerListsApiVersion2()
     {
         using namespace jtx;
-        Env env{*this, envconfig([](std::unique_ptr<Config> c) {
-                    c->loadFromString("\n[beta_rpc_api]\n1\n");
-                    return c;
-                })};
+        Env env{*this};
         Account const alice{"alice"};
         env.fund(XRP(1000), alice);
 

src/test/rpc/Version_test.cpp

@@ -76,11 +76,16 @@ class Version_test : public beast::unit_test::suite
                 std::to_string(RPC::apiMinimumSupportedVersion - 1) + "}");
         BEAST_EXPECT(badVersion(re));
 
+        BEAST_EXPECT(env.app().config().BETA_RPC_API);
         re = env.rpc(
             "json",
             "version",
             "{\"api_version\": " +
-                std::to_string(RPC::apiMaximumSupportedVersion + 1) + "}");
+                std::to_string(
+                    std::max(
+                        RPC::apiMaximumSupportedVersion, RPC::apiBetaVersion) +
+                    1) +
+                "}");
         BEAST_EXPECT(badVersion(re));
 
         re = env.rpc("json", "version", "{\"api_version\": \"a\"}");
@@ -190,20 +195,25 @@ class Version_test : public beast::unit_test::suite
         using namespace test::jtx;
         Env env{*this};
 
+        BEAST_EXPECT(env.app().config().BETA_RPC_API);
         auto const without_api_verion = std::string("{ ") +
             "\"jsonrpc\": \"2.0\", "
             "\"ripplerpc\": \"2.0\", "
             "\"id\": 5, "
             "\"method\": \"version\", "
             "\"params\": {}}";
-        auto const with_wrong_api_verion = std::string("{ ") +
+        auto const with_wrong_api_verion =
+            std::string("{ ") +
             "\"jsonrpc\": \"2.0\", "
             "\"ripplerpc\": \"2.0\", "
             "\"id\": 6, "
             "\"method\": \"version\", "
             "\"params\": { "
             "\"api_version\": " +
-            std::to_string(RPC::apiMaximumSupportedVersion + 1) + "}}";
+            std::to_string(
+                std::max(RPC::apiMaximumSupportedVersion, RPC::apiBetaVersion) +
+                1) +
+            "}}";
         auto re = env.rpc(
             "json2",
             '[' + without_api_verion + ", " + with_wrong_api_verion + ']');