PLT-6341/PLT-6342 Update gorp to mattermost fork and add connection timeout setting (#6410)

* Update gorp to mattermost fork and add connection timeout setting

* Add go dependency

* Rename from connection timeout to query timeout

* Properly add gorp dependency

vendor/github.com/mattermost/gorp/index.go

@@ -0,0 +1,56 @@
+// Copyright 2012 James Cooper. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+// Package gorp provides a simple way to marshal Go structs to and from
+// SQL databases.  It uses the database/sql package, and should work with any
+// compliant database/sql driver.
+//
+// Source code and project home:
+// https://github.com/go-gorp/gorp
+
+package gorp
+
+// IndexMap represents a mapping between a Go struct field and a single
+// index in a table.
+// Unique and MaxSize only inform the
+// CreateTables() function and are not used by Insert/Update/Delete/Get.
+type IndexMap struct {
+	// Index name in db table
+	IndexName string
+
+	// If true, " unique" is added to create index statements.
+	// Not used elsewhere
+	Unique bool
+
+	// Index type supported by Dialect
+	// Postgres:  B-tree, Hash, GiST and GIN.
+	// Mysql: Btree, Hash.
+	// Sqlite: nil.
+	IndexType string
+
+	// Columns name for single and multiple indexes
+	columns []string
+}
+
+// Rename allows you to specify the index name in the table
+//
+// Example:  table.IndMap("customer_test_idx").Rename("customer_idx")
+//
+func (idx *IndexMap) Rename(indname string) *IndexMap {
+	idx.IndexName = indname
+	return idx
+}
+
+// SetUnique adds "unique" to the create index statements for this
+// index, if b is true.
+func (idx *IndexMap) SetUnique(b bool) *IndexMap {
+	idx.Unique = b
+	return idx
+}
+
+// SetIndexType specifies the index type supported by chousen SQL Dialect
+func (idx *IndexMap) SetIndexType(indtype string) *IndexMap {
+	idx.IndexType = indtype
+	return idx
+}