Merge pull request #7759 from qlyoung/reformat-tests-again

Reformat tests again

diff --cc tests/topotests/bgp-ecmp-topo2/test_ebgp_ecmp_topo2.py
Simple merge

diff --cc tests/topotests/bgp-ecmp-topo2/test_ibgp_ecmp_topo2.py
Simple merge

diff --cc tests/topotests/lib/common_config.py
Simple merge

diff --cc tests/topotests/lib/topogen.py
Simple merge

diff --cc tests/topotests/lib/topotest.py
Simple merge

diff --cc tests/topotests/ospf_basic_functionality/test_ospf_single_area.py
Simple merge