Run unit tests in parallel

src/test/rpc/RPCOverload_test.cpp

@@ -63,7 +63,7 @@ public:
             {
                 // Don't use BEAST_EXPECT above b/c it will be called a non-deterministic number of times
                 // and the number of tests run should be deterministic
-                fail();
+                fail("", __FILE__, __LINE__);
             }
 
             if(jv.isMember(jss::warning))

src/test/rpc/Subscribe_test.cpp

@@ -454,7 +454,7 @@ public:
         }
 
         {
-            Env env_nonadmin {*this, no_admin(envconfig(port_increment, 2))};
+            Env env_nonadmin {*this, no_admin(envconfig(port_increment, 3))};
             Json::Value jv;
             jv[jss::url] = "no-url";
             auto jr = env_nonadmin.rpc("json", method, to_string(jv)) [jss::result];