Set default value for 'flowtable_agent_ratio'
Set default value for 'flowtable_agent_ratio'

Change-Id: I765e3ba57d547bb56f70350b1a7e8d555ca86112

skydive-project/skydive,safchain/skydive,safchain/skydive,lebauce/skydive,skydive-project/skydive,skydive-project/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,skydive-project/skydive,lebauce/skydive,redhat-cip/skydive,safchain/skydive,lebauce/skydive,redhat-cip/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,lebauce/skydive,skydive-project/skydive,skydive-project/skydive,lebauce/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,redhat-cip/skydive