moving some memory allocation to init function rather than within

execution cycles and fixing test db tear down so that it drops
checked_headers table instead of individual columns (droping columns
only hides them, they remain in memory and continue to contribute to the
1600 column limit which causes us to eventually exceed it)

cmd/omniWatcher.go

@@ -92,8 +92,8 @@ func omniWatcher() {
 		t.SetMethods(addr, contractMethods)
 		t.SetEventArgs(addr, eventArgs)
 		t.SetMethodArgs(addr, methodArgs)
-		t.SetRange(addr, [2]int64{startingBlockNumber, endingBlockNumber})
 		t.SetPiping(addr, methodPiping)
+		t.SetStartingBlock(addr, startingBlockNumber)
 	}
 
 	err := t.Init()
@@ -121,6 +121,5 @@ func init() {
 	omniWatcherCmd.Flags().StringArrayVarP(&methodArgs, "method-args", "g", []string{}, "Argument values to limit methods to; will only call methods with emitted values that were specified here")
 	omniWatcherCmd.Flags().StringVarP(&network, "network", "n", "", `Network the contract is deployed on; options: "ropsten", "kovan", and "rinkeby"; default is mainnet"`)
 	omniWatcherCmd.Flags().Int64VarP(&startingBlockNumber, "starting-block-number", "s", 0, "Block to begin watching- default is first block the contract exists")
-	omniWatcherCmd.Flags().Int64VarP(&endingBlockNumber, "ending-block-number", "d", -1, "Block to end watching- default is most recent block")
 	omniWatcherCmd.Flags().BoolVarP(&methodPiping, "piping", "p", false, "Turn on method output piping: methods listed first will be polled first and their output used as input to subsequent methods")
 }