Switch back to upstream goth repository and update govendor to latest goth version (#3863)

Author: lafriks

vendor/github.com/markbates/goth/README.md

@@ -678,74 +678,64 @@
 			"revisionTime": "2017-10-25T03:15:54Z"
 		},
 		{
-			"checksumSHA1": "q9MD1ienC+kmKq5i51oAktQEV1E=",
-			"origin": "github.com/go-gitea/goth",
+			"checksumSHA1": "2fOWeJ+HGddUUTBlvpRIF4v2x5E=",
 			"path": "github.com/markbates/goth",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
-			"checksumSHA1": "FISfgOkoMtn98wglLUvfBTZ6baE=",
-			"origin": "github.com/go-gitea/goth/gothic",
+			"checksumSHA1": "cZLls/zE/yokmiyypPyGfJWh69E=",
 			"path": "github.com/markbates/goth/gothic",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "pJ+Cws/TU22K6tZ/ALFOvvH1K5U=",
-			"origin": "github.com/go-gitea/goth/providers/bitbucket",
 			"path": "github.com/markbates/goth/providers/bitbucket",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "XsF5HI4240QHbFXbtWWnGgTsoq8=",
-			"origin": "github.com/go-gitea/goth/providers/dropbox",
 			"path": "github.com/markbates/goth/providers/dropbox",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "VzbroIA9R00Ig3iGnOlZLU7d4ls=",
-			"origin": "github.com/go-gitea/goth/providers/facebook",
 			"path": "github.com/markbates/goth/providers/facebook",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "P6nBZ850aaekpOcoXNdRhK86bH8=",
-			"origin": "github.com/go-gitea/goth/providers/github",
 			"path": "github.com/markbates/goth/providers/github",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "ld488t+yGoTwtmiCSSggEX4fxVk=",
-			"origin": "github.com/go-gitea/goth/providers/gitlab",
 			"path": "github.com/markbates/goth/providers/gitlab",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "qXEulD7vnwY9hFrxh91Pm5YrvTM=",
-			"origin": "github.com/go-gitea/goth/providers/gplus",
 			"path": "github.com/markbates/goth/providers/gplus",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "wsOBzyp4LKDhfCPmX1LLP7T0S3U=",
-			"origin": "github.com/go-gitea/goth/providers/openidConnect",
 			"path": "github.com/markbates/goth/providers/openidConnect",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "o6RqMbbE8QNZhNT9TsAIRMPI8tg=",
-			"origin": "github.com/go-gitea/goth/providers/twitter",
 			"path": "github.com/markbates/goth/providers/twitter",
-			"revision": "3b54d96084a5e11030f19556cf68a6ab5d93ba20",
-			"revisionTime": "2018-03-12T06:32:04Z"
+			"revision": "4933f155d89c3c52ab4ca545c6602cf4a1e87913",
+			"revisionTime": "2018-04-12T22:15:10Z"
 		},
 		{
 			"checksumSHA1": "61HNjGetaBoMp8HBOpuEZRSim8g=",