check for objects with same name as module

[achubaty]

From @CeresBarros

Using module named climateData, the following causes weird sim behaviour, including not printing the simList, incorrect parsing, and events not running.

  sim$climateData <- rbindlist(list(baselineClimateData, projClimateData), use.names = TRUE)

but renaming the object to

  sim$climateDT <- rbindlist(list(baselineClimateData, projClimateData), use.names = TRUE)

fixes the issues.

We need to check each module for this and provide meaningful message to the user if it's not something we can fix.