Automateservicecatalogs

This PR automates service catalog tests for Vsphere , RHEV and Amazon . All tests pass except for ec2 in which i am not able to select any value in the "Security Group" option box  - 
https://github.com/sshveta/cfme_tests/blob/automateservicecatalogs/pages/services_subpages/provision_subpages/provision_environment.py#L173 , the automation code selects the option and immediately switches back to the default option "Choose " 
The issue can be seen by running the tests for ec2_image_workflow . 
Also  , the tests are running so fast that the data entered in certain text fields disappears sometimes and i had to use time.sleep() at certain places . To avoid that i have written time.sleep() in get_element() def in Page.py . Not sure if that's the correct way or not . Please check and suggest if anything more suitable can be done . Thanks