changed: better formatting for debug log

The full output without ellipsis can still be shown in the REPL with the following logger:
`debuglogger = ConsoleLogger(stderr, Logging.Debug, show_limited=false)`

Author: franckgaga

src/controller/execute.jl

@@ -525,7 +525,7 @@ function optim_objective!(mpc::PredictiveController{NT}) where {NT<:Real}
             @warn("MPC termination status not OPTIMAL or LOCALLY_SOLVED: keeping "*
                   "solution anyway", status)
         end
-        @debug getinfo(mpc)
+        @debug("The function getinfo returns: ", getinfo(mpc))
     end
     if iserror(optim)
         mpc.ΔŨ .= ΔŨ0

src/estimator/mhe/execute.jl

@@ -412,7 +412,7 @@ function optim_objective!(estim::MovingHorizonEstimator{NT}) where NT<:Real
             @warn("MHE termination status not OPTIMAL or LOCALLY_SOLVED: keeping "*
                   "solution anyway", status)
         end
-        @debug getinfo(estim)
+        @debug("The function getinfo returns: ", getinfo(estim))
     end
     if iserror(optim)
         estim.Z̃ .= Z̃_0