tests: Add tests for delete using mock framework
tests: Add tests for delete using mock framework

This should increase the test coverage

Fixes #400

Signed-off-by: Archana Shinde <047ac45ce396f63f3cf93ff43725668e736e0632@intel.com>

chavafg/runtime,devimc/runtime,devimc/runtime,chavafg/runtime,clearcontainers/runtime,clearcontainers/runtime