CLI Logging Messages

[arnaud-m]

Improve the logging message according to the verbosity

• 2.: Generator Levels Info
• 3: Generator Matrices Info
• 4: Export Network (graphivz)
• 5: Network Info
• 0: XCSP Status and Objective
• 1: XCSP Solution
• 1: XCSP Output
• 4: Export solution (graphivz)

[arnaud-m]

//Logging Levels and messages
#define SILENT -1
//XCSP Status and Objective
#define QUIET 0
//XCSP solution, diagnostics, configurations
#define DEFAULT 1
//Print generator and export problems and solutions (graphviz + solver)
#define VERBOSE 2
//MIP node log display information
#define SEARCH 3
//Print network info
#define ALL 4

[arnaud-m]

Add logging messages for each subproblem.
ISSUE: pass 'out' to solver.solve() ?

[arnaud-m]

Should also check the cplex status and sbproblem number to give more precise opossum status.