Geo: order same level pars semantically

Signed-off-by: Felix Schlepper <[email protected]>

Author: f3sch

Detectors/Base/src/GeometryManager.cxx

@@ -253,7 +253,15 @@ bool GeometryManager::applyAlignment(const std::vector<o2::detectors::AlignParam
   int nvols = algPars.size();
   std::vector<int> ord(nvols);
   std::iota(std::begin(ord), std::end(ord), 0); // sort to apply alignment in correct hierarchy
-  std::sort(std::begin(ord), std::end(ord), [&algPars](int a, int b) { return algPars[a].getLevel() < algPars[b].getLevel(); });
+  std::sort(std::begin(ord), std::end(ord), [&algPars](int a, int b) {
+    if (algPars[a].getLevel() < algPars[b].getLevel()) {
+      return true;
+    } else {
+      // if pars are on the same level the order does not matter, however comparing the log for different input it is
+      // easier to sort these semantically.
+      return algPars[a].getSymName() < algPars[b].getSymName();
+    }
+  });
 
   bool res = true;
   for (int i = 0; i < nvols; i++) {