Ignore not unit-testable functions

These are pugs initialize and finalize functions.

These functions cannot be checked in the unit-tests framework.

src/utils/PugsUtils.cpp

@@ -19,6 +19,10 @@
 
 #include <iostream>
 
+// LCOV_EXCL_START
+
+// This function cannot be unit-tested: run once when pugs starts
+
 std::string
 initialize(int& argc, char* argv[])
 {
@@ -98,6 +102,12 @@ initialize(int& argc, char* argv[])
   return filename;
 }
 
+// LCOV_EXCL_STOP
+
+// LCOV_EXCL_START
+
+// This function cannot be unit-tested: run once when pugs stops
+
 void
 finalize()
 {
@@ -105,3 +115,5 @@ finalize()
   PETScWrapper::finalize();
   parallel::Messenger::destroy();
 }
+
+// LCOV_EXCL_STOP