DataMisfitController() == DataMisfitController() gives false

[odunbar]

For some types, the Scheduler() == Scheduler() gives false, which is likely to cause test failures.
(Note that all the internal fields give true on "==")

Need to override == as done for ParameterDistributions here:

EnsembleKalmanProcesses.jl/src/ParameterDistributions.jl

Lines 557 to 564 in c746772

	Base.:(==)(p_a::ParameterDistributionType, p_b::ParameterDistributionType) =
	get_distribution(p_a) == get_distribution(p_b)
	Base.:(==)(c_a::ConstraintType, c_b::ConstraintType) = typeof(c_a) == typeof(c_b) && get_bounds(c_a) == get_bounds(c_b)
	Base.:(==)(pd_a::ParameterDistribution, pd_b::ParameterDistribution) =
	get_distribution(pd_a) == get_distribution(pd_b) &&
	get_all_constraints(pd_a) == get_all_constraints(pd_b) &&
	get_name(pd_a) == get_name(pd_b)