Integration tests for SAVE-Cloud

The following properties control the behavior of the tests:

• save-cloud.backend.url

• save-cloud.user

• save-cloud.password

• save-cloud.test.suite.ids

• save-cloud.test.version

• save-cloud.test.language

• save-cloud.use.external.files

• save-cloud.project.name

• save-cloud.contest.name

During the build process, they may be specified as either a Gradle or a Java System property.

./gradlew build -Dsave-cloud.backend.url=https://saveourtool.com

is equivalent to

./gradlew build -Psave-cloud.backend.url=https://saveourtool.com