Changing Number of SONs

Changing Number of SONs

son_count parameter is introduced in the extensions of chain_parameters of the blockchain.
In order to change the parameter, a committee proposal has to be issued.
This is similar to how we have been issuing the committee proposals.
First, a propose_parameter_change has to be issued.
And an approve_proposal has to be issued within the review period of the proposal created.

Eg:
propose_parameter_change <commmitte-account> <expiry-timestamp> {"extensions":{"son_count" : 21}} true
propose_parameter_change com0 "2019-10-18T11:31:13" {"extensions":{"son_count" : 21}} true

approve_proposal <committee-account> <proposal-id> {"active_approvals_to_add" : [<MY-COMMITTEE-MEMBER>]} true
approve_proposal com0 "1.10.1" {"active_approvals_to_add" : ["com0"]} true