Fix failing compilations

Author: loumalouomega

applications/CSharpWrapperApplication/tests/cpp_tests/test_calculate.cpp

@@ -86,8 +86,8 @@ namespace Kratos {
             })");
             const std::string &r_json_text = json_parameters.PrettyPrintJsonString();
             std::filebuf buffer;
-            file_path = std::filesystem::current_path() / "file.json";
-            buffer.open(file_path.string().c_str(), std::ios::out);
+            std::filesystem::path file_path_json = std::filesystem::current_path() / "file.json";
+            buffer.open(file_path_json.string().c_str(), std::ios::out);
             std::ostream os(&buffer);
             os << r_json_text;
             buffer.close();

applications/ContactStructuralMechanicsApplication/tests/cpp_tests/linear_solvers/test_mixedulm_linear_solver.cpp

@@ -69,8 +69,8 @@ void CreateAuxiliaryFiles()
     const std::string rhs = "%%MatrixMarket matrix array real general\n16 1\n0\n0\n0\n-5.1725e+07\n0\n-1.0345e+08\n0\n-5.1725e+07\n0\n-1.0345e+08\n0\n-6.23386e+08\n0\n-6.23386e+08\n0\n0\n";
 
     std::filebuf buffer_rhs;
-    file_path = std::filesystem::current_path() / "b_testing_condensation.rhs";
-    buffer_rhs.open(file_path.string().c_str(),std::ios::out);
+    std::filesystem::path file_path_json = std::filesystem::current_path() / "b_testing_condensation.rhs";
+    buffer_rhs.open(file_path_json.string().c_str(),std::ios::out);
     std::ostream os_rhs(&buffer_rhs);
     os_rhs << rhs;
     buffer_rhs.close();