[CB-4013] Fixed loadUrlTimeoutValue preference.
CB-3819: Implemented Feature
[CB-4463] Updated bin/check_reqs to looks for android-18 target.Also fixed an issue in unix version of script that would invoke the `android` command if an error occurred.
[CB-4466] fixed jscript check_reqs to get target from project.properties
Remove plugin references in test project's config.xml