Ensure generated content is friendlier to golint

I've stolen the list of "initialisms" from the golint codebase. Normally
I might try and figure out some way to bring the list in from the source
rather than just copy and paste it, since it may fall out of date in the
future. However, if you've ever followed any of the PRs in the golint
repository, you'll know any change like that would likely be rejected.
Most of this list hasn't changed in the last 4 years, so my feeling is
that it won't require many more updates for the life of this project.

pkg/moq/moq.go

@@ -15,6 +15,49 @@ import (
 	"text/template"
 )
 
+// This list comes from the golint codebase. Golint will complain about any of
+// these being mixed-case, like "Id" instead of "ID".
+var golintInitialisms = []string{
+	"ACL",
+	"API",
+	"ASCII",
+	"CPU",
+	"CSS",
+	"DNS",
+	"EOF",
+	"GUID",
+	"HTML",
+	"HTTP",
+	"HTTPS",
+	"ID",
+	"IP",
+	"JSON",
+	"LHS",
+	"QPS",
+	"RAM",
+	"RHS",
+	"RPC",
+	"SLA",
+	"SMTP",
+	"SQL",
+	"SSH",
+	"TCP",
+	"TLS",
+	"TTL",
+	"UDP",
+	"UI",
+	"UID",
+	"UUID",
+	"URI",
+	"URL",
+	"UTF8",
+	"VM",
+	"XML",
+	"XMPP",
+	"XSRF",
+	"XSS",
+}
+
 // Mocker can generate mock structs.
 type Mocker struct {
 	src     string
@@ -240,6 +283,11 @@ var templateFuncs = template.FuncMap{
 		if s == "" {
 			return ""
 		}
+		for _, initialism := range golintInitialisms {
+			if strings.ToUpper(s) == initialism {
+				return initialism
+			}
+		}
 		return strings.ToUpper(s[0:1]) + s[1:]
 	},
 }

pkg/moq/moq_test.go

@@ -31,6 +31,7 @@ func TestMoq(t *testing.T) {
 		"lockPersonStoreMockGet.Lock()",
 		"mock.calls.Get = append(mock.calls.Get, callInfo)",
 		"lockPersonStoreMockGet.Unlock()",
+		"// ID is the id argument value",
 	}
 	for _, str := range strs {
 		if !strings.Contains(s, str) {