[xMeshTool] add a new Parmetis partition function with weight
This commit is adding template function setParmetisPartitionWithWeight that use a set of weights per element to optimize ParMetis partitioning based on multi criteria (the weights). The template parameter (an int) is fixing the number of weights per element. The interface is kept simple. Only an extra xAttachedDataManagerAOMD is used to passe weights set per element. No test case for now but it have been heavily tested in some apps. This function is using almost the same algo as the one used for setParmetisPartition in the cc file. It is rather dirty (code duplication) but efficient. It add also a new dependency in terms of cmake. xInterfaceParMetis must now be added in cmake to use xLoadBalanceTools. But anyway from my point of view it should already be the case. Normally xInterfaceParMetis should embedded ParMetis and in cmake finding metis/parmetis lib should not be done.... Modern cmake would do even more by setting all this dependency setting for you .....