This change set adds a new option ('--collections-config') so that the
chaincode developer can specify the configuration of a collection when
deploying a new chaincode. The option expects a file name; the content of the
file will be read and parsed as a JSON-formatted array of the following struct

type collectionConfigJson struct {
	Name              string `json:"name"`
	Policy            string `json:"policy"`
        RequiredCount int32  `json:"requiredPeerCount"`
	MaxPeerCount  int32  `json:"maxPeerCount"`
}

Change-Id: Ifceed0db612b36c793937ef6704e8a179981413d
Signed-off-by: Alessandro Sorniotti <ale.linux@sopit.net>
Signed-off-by: yacovm <yacovm@il.ibm.com>