multi: add new build tag integration

This commit adds a new build tag `integration` and removes the old tag
`rpctest` for clarity. Multiple unnecessary usages of `build !rpctest`
is also removed.

aezeed/cipherseed_integration.go

@@ -0,0 +1,13 @@
+//go:build integration
+
+package aezeed
+
+import "github.com/btcsuite/btcwallet/waddrmgr"
+
+func init() {
+	// For the purposes of our itest, we'll crank down the scrypt params a
+	// bit.
+	scryptN = waddrmgr.FastScryptOptions.N
+	scryptR = waddrmgr.FastScryptOptions.R
+	scryptP = waddrmgr.FastScryptOptions.P
+}