Fix possible deadlock when queries and delete series run concurrently
Fix possible deadlock when queries and delete series run concurrently

This locks showeed up in a deadlock systems running queries and
delete series across a large dataset.  Queries should not need to
lock the tsdb.Store for writes

arussellsaw/influxdb,daachi/influxdb,chenziliang/influxdb,daachi/influxdb,archsaber/influxdb,joaopedrotaveira/influxdb,influxdb/influxdb,pkittenis/influxdb,li-ang/influxdb,runner-mei/influxdb,linearb/influxdb,mnuessler/influxdb,arussellsaw/influxdb,pkittenis/influxdb,mnuessler/influxdb,apigee/influxdb,mnuessler/influxdb,vladlopes/influxdb,daachi/influxdb,joaopedrotaveira/influxdb,pkittenis/influxdb,otoolep/influxdb,influxdata/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,mnuessler/influxdb,archsaber/influxdb,mark-rushakoff/influxdb,chenziliang/influxdb,chenziliang/influxdb,influxdb/influxdb,daachi/influxdb,otoolep/influxdb,archsaber/influxdb,benbjohnson/influxdb,pkittenis/influxdb,runner-mei/influxdb,linearb/influxdb,mnuessler/influxdb,apigee/influxdb,chenziliang/influxdb,joaopedrotaveira/influxdb,otoolep/influxdb,jgeiger/influxdb,linearb/influxdb,li-ang/influxdb,influxdata/influxdb,mark-rushakoff/influxdb,runner-mei/influxdb,influxdb/influxdb,benbjohnson/influxdb,otoolep/influxdb,otoolep/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,arussellsaw/influxdb,apigee/influxdb,vladlopes/influxdb,nooproblem/influxdb,otoolep/influxdb,mark-rushakoff/influxdb,jgeiger/influxdb,jgeiger/influxdb,apigee/influxdb,linearb/influxdb,arussellsaw/influxdb,daachi/influxdb,archsaber/influxdb,benbjohnson/influxdb,influxdb/influxdb,daachi/influxdb,nooproblem/influxdb,pkittenis/influxdb,mnuessler/influxdb,jgeiger/influxdb,influxdb/influxdb,nooproblem/influxdb,arussellsaw/influxdb,linearb/influxdb,arussellsaw/influxdb,runner-mei/influxdb,pkittenis/influxdb,jgeiger/influxdb,joaopedrotaveira/influxdb,jgeiger/influxdb,mark-rushakoff/influxdb,joaopedrotaveira/influxdb,apigee/influxdb,benbjohnson/influxdb,vladlopes/influxdb,nooproblem/influxdb,apigee/influxdb,vladlopes/influxdb