#2 Test failure: Issues with estimation of lowerConnectivity

[Alexander Frey]

Investigate and fix underlying issue in h_lowerCon or h_isSource calculation, and enable the following assert in LinearSamplingTests.cpp:

if (h_lowerCon[i] == 0) {
// Disable this verification. I guess this is a bug in lowerCon / isSource calculation!
// ASSERT_TRUE(h_isSource[i]);
}