GitLab

__Description__

Refine test cases for microbenchmark:
* Refine test fixture, add BenchmarkTestCase class.
* Refine test data.
* Resolve no numa issue for test_ib_loopback_util case.

**Description**
Unify metric names of benchmarks.

**Description**
Add return_code metric into result and revise unit tests.

**Description**
Add gpcnet microbenchmark

**Major Revision**
- add 2 microbenmark for gpcnet, gpc-network-test, gpc-network-load-test
- add related test and example file