fixing bugs

contracts/integrations/test/framework/utils/logger.ts

@@ -29,7 +29,7 @@ class Logger {
                 msg: `Function called: ${functionName}(${functionArgs
                     .map(arg => JSON.stringify(arg).replace(/"/g, "'"))
                     .join(', ')})`,
-                step: this._step++,
+                step: ++this._step,
                 txData,
             }),
         );

contracts/integrations/test/framework/utils/pseudorandom.ts

@@ -3,7 +3,7 @@ import { BigNumber } from '@0x/utils';
 import * as seedrandom from 'seedrandom';
 
 class PRNGWrapper {
-    public readonly seed = process.env.UUID || Math.random().toString();
+    public readonly seed = process.env.SEED || Math.random().toString();
     private readonly _rng = seedrandom(this.seed);
 
     /*