linters: modify code to pass maligned and interfacer (#3959)

* Fix maligned structs

* Fix interfacer errors

* Revert accidental go.mod and go.sum changes

* Revert P2PConfig struct maligned reorder

* Revert PeerRoundState struct maligned reordering

* Revert RoundState struct maligned reordering

* Reorder WSClient struct

* Revert accidental type change

* Clean up type change

* Clean up type changes

* Revert to types.ABCIApplicationServer in GRPCServer struct

* Revert maligned changes to BaseConfig struct

* Fix tests in io_test.go

* Fix client_test package tests

* Fix reactor tests in consensus package

* Fix new interfacer errors

mempool/clist_mempool.go

@@ -29,6 +29,15 @@ import (
 // mempool uses a concurrent list structure for storing transactions that can
 // be efficiently accessed by multiple concurrent readers.
 type CListMempool struct {
+	// Atomic integers
+	height     int64 // the last block Update()'d to
+	txsBytes   int64 // total size of mempool, in bytes
+	rechecking int32 // for re-checking filtered txs on Update()
+
+	// notify listeners (ie. consensus) when txs are available
+	notifiedTxsAvailable bool
+	txsAvailable         chan struct{} // fires once for each height, when the mempool is not empty
+
 	config *cfg.MempoolConfig
 
 	proxyMtx     sync.Mutex
@@ -43,19 +52,10 @@ type CListMempool struct {
 	recheckCursor *clist.CElement // next expected response
 	recheckEnd    *clist.CElement // re-checking stops here
 
-	// notify listeners (ie. consensus) when txs are available
-	notifiedTxsAvailable bool
-	txsAvailable         chan struct{} // fires once for each height, when the mempool is not empty
-
 	// Map for quick access to txs to record sender in CheckTx.
 	// txsMap: txKey -> CElement
 	txsMap sync.Map
 
-	// Atomic integers
-	height     int64 // the last block Update()'d to
-	txsBytes   int64 // total size of mempool, in bytes
-	rechecking int32 // for re-checking filtered txs on Update()
-
 	// Keep a cache of already-seen txs.
 	// This reduces the pressure on the proxyApp.
 	cache txCache