ovsdb: add mutex around ovsdb client
ovsdb: add mutex around ovsdb client

lebauce/skydive,skydive-project/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive,safchain/skydive,lebauce/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,skydive-project/skydive,safchain/skydive