Cleaning of heap test and bug fix in heap concept check (ticket #100)

* The dijkstra heap test's digraph is inlined into the source file
* The random sequences are fixed
* The content of the header is moved to the source file
* Only the binary heap is checked

 /* Define to 1 if you have CPLEX. */

 #undef HAVE_CPLEX

 /* Define to 1 if you have GLPK. */

 #undef HAVE_GLPK