refac(ci): switch stage order (#120)

Author: juancarlostong

.travis.yml

@@ -10,6 +10,11 @@ script:
   - xbuild /p:Configuration=Release ./OptimizelySDK.Travis.sln
   - mono ./testrunner/NUnit.Runners.2.6.4/tools/nunit-console.exe ./OptimizelySDK.Tests/bin/Release/OptimizelySDK.Tests.dll 
 
+# Integration tests need to run first to reset the PR build status to pending
+stages:
+  - 'Integration tests'
+  - 'Test'
+
 jobs:
   include:
     - stage: 'Integration tests'