support environment variables on 'run'

lib/run.js

@@ -44,6 +44,13 @@ module.exports = {
     };
   },
 
+  setEnvironmentVars(functionName) {
+    const providerEnvVars = this.serverless.service.provider.environment || {};
+    const functionEnvVars = this.serverless.service.functions[functionName].environment || {};
+
+    Object.assign(process.env, providerEnvVars, functionEnvVars);
+  },
+
   run(stats) {
     const functionName = this.options.function;
 
@@ -52,6 +59,7 @@ module.exports = {
     const handler = this.loadHandler(stats, functionName);
     const event = this.getEvent();
     const context = this.getContext(functionName);
+    this.setEnvironmentVars(functionName);
 
     return new BbPromise((resolve, reject) => handler(
       event,
@@ -80,6 +88,8 @@ module.exports = {
       const handler = this.loadHandler(stats, functionName, true);
       const event = this.getEvent();
       const context = this.getContext(functionName);
+      this.setEnvironmentVars(functionName);
+
       handler(
         event,
         context,