fixups in logging init calls, and add missing net context in a log

tests/unit_tests/main.cpp

@@ -35,6 +35,7 @@
 int main(int argc, char** argv)
 {
   epee::string_tools::set_module_name_and_folder(argv[0]);
+  mlog_configure(mlog_get_default_log_path("unit_tests.log"), true);
   epee::debug::get_set_enable_assert(true, false);
 
   ::testing::InitGoogleTest(&argc, argv);