Making https as default uri scheme

Before Change : The app url will only use http for their communication.
After Change : By default https will be used and ssl validation will be based on skip_ssl_validation flag value in integration.json

Issue : http://rnd-github.huawei.com/cloudfoundry/cf-smoke-tests/issues/1
Merge pull request #6 from asifhuawei/hw-issue-1.1

Making https as default uri scheme