Group some string vars into string array #705

const sshDefaultUserName01 string = "cb-user"
const sshDefaultUserName02 string = "ubuntu"
const sshDefaultUserName03 string = "root"
const sshDefaultUserName04 string = "ec2-user"

...

	userNames := []string{
		userName,
		givenUserName,
		sshDefaultUserName01,
		sshDefaultUserName02,
		sshDefaultUserName03,
		sshDefaultUserName04,
	}

var sshDefaultUsername = []string{"cb-user", "ubuntu", "root", "ec2-user"}

...

	userNames := []string{
		userName,
		givenUserName,
		sshDefaultUsername[0],
		sshDefaultUsername[1],
		sshDefaultUsername[2],
		sshDefaultUsername[3],
	}