Make Rectilinear and Regular builder tests faster
Previously UnitTestDataSetBuilderRectilinear and UnitTestDataSetBuilderRegular did an exhaustive test of all possible grid sizes within a certain amount of dimensions and with some number of ways to build point arrays. This created hundreds of thousands of cases that were checked, and it was running a long time. At best it wasted time and at worst ctest reported the test as timed out. It is not really necessary to perform an exhaustive test. The tests are changed to do 10 trials using random values for dimensions and fill methods.