update cinder optimization option in chef cookbook

[Kui Shi]

In order to improve the performance, following tested/verified options should updated in chef cookbook:

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/etc/haprxy/haproxy.cfg

timeout check 300s
timeout client 300s
timeout connect 300s
timeout server 300s

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/etc/cinder/cinder.conf

osapi_volume_workers = 8
rpc_thread_pool_size=240
volume_service_inithost_offload=True

[database]
max_pool_size = 100
idle_time = 3600

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/etc/my.cnf MySql

open-files-limit = 10000