Disable assertLegacySafe when concurrent lumis are enabled.

Note that this does not actually mean it is safe to use concurrent
lumis; we just disable the check if concurrent lumis are actually
requested. In fact, we know that assertLegacySafe fails even when there
are legacy modules that should block concurrent lumis.

Configuration/Applications/python/ConfigBuilder.py

@@ -2232,6 +2232,8 @@ def prepare(self, doChecking = False):
             self.pythonCfgCode +="process.options.numberOfThreads=cms.untracked.uint32("+self._options.nThreads+")\n"
             self.pythonCfgCode +="process.options.numberOfStreams=cms.untracked.uint32("+self._options.nStreams+")\n"
             self.pythonCfgCode +="process.options.numberOfConcurrentLuminosityBlocks=cms.untracked.uint32("+self._options.nConcurrentLumis+")\n"
+            if self._options.nConcurrentLumis > 1:
+              self.pythonCfgCode +="if process.DQMStore: process.DQMStore.assertLegacySafe=cms.untracked.bool(False)\n"
             self.process.options.numberOfThreads=cms.untracked.uint32(int(self._options.nThreads))
             self.process.options.numberOfStreams=cms.untracked.uint32(int(self._options.nStreams))
             self.process.options.numberOfConcurrentLuminosityBlocks=cms.untracked.uint32(int(self._options.nConcurrentLumis))