[bench] rename include_checks.sh to common.sh

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] start QEMU from a function

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] start loadgen from a function 

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] run NFV from function

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] do_lock will work on multiple arguments

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] loadgen test will run multiple items

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] cpu affinity

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] log file names

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[bench] update documentation

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Merge pull request #215 from virtualopensystems/bench_n

N-way benchmarking