Update Go dependencies (#631)

Also switch to using lumberjack's preferred import path on gopkg.in.

go.mod

@@ -1,23 +1,18 @@
 module github.com/yahoo/athenz
 
 require (
-	github.com/BurntSushi/toml v0.3.0 // indirect
+	github.com/BurntSushi/toml v0.3.1 // indirect
 	github.com/ardielle/ardielle-go v1.5.1
-	github.com/ardielle/ardielle-tools v1.14.15 // indirect
 	github.com/boynton/repl v0.0.0-20170116235056-348863958e3e
-	github.com/davecgh/go-spew v1.1.1
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dimfeld/httptreemux v5.0.1+incompatible
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/mux v1.6.2
-	github.com/natefinch/lumberjack v2.0.0+incompatible
-	github.com/pmezard/go-difflib v1.0.0
-	github.com/stretchr/objx v0.1.1
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/testify v1.2.2
 	golang.org/x/crypto v0.0.0-20180910181607-0e37d006457b
 	golang.org/x/net v0.0.0-20180921000356-2f5d2388922f
-	golang.org/x/sys v0.0.0-20180920110915-d641721ec2de
-	golang.org/x/text v0.3.0
-	golang.org/x/tools v0.0.0-20181012201414-c0eb142035b5
-	gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
+	golang.org/x/sys v0.0.0-20180920110915-d641721ec2de // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 	gopkg.in/yaml.v2 v2.2.1
 )

go.sum

@@ -1,9 +1,7 @@
-github.com/BurntSushi/toml v0.3.0 h1:e1/Ivsx3Z0FVTV0NSOv/aVgbUWyQuzj7DDnFblkRvsY=
-github.com/BurntSushi/toml v0.3.0/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/ardielle/ardielle-go v1.5.1 h1:7vSvfYuByBHGSk+8am0u2DT92+95UFtxdp5fkSEQTII=
 github.com/ardielle/ardielle-go v1.5.1/go.mod h1:I4hy1n795cUhaVt/ojz83SNVCYIGsAFAONtv2Dr7HUI=
-github.com/ardielle/ardielle-tools v1.14.15 h1:BukXV+2FhI3mXbb4x9HdfTDfe9bC2yBhRWxk3Kl9yUA=
-github.com/ardielle/ardielle-tools v1.14.15/go.mod h1:md5tB6Ld1xXeYT0iETNHj4/Dm+funcuxeZn2yXWmvCY=
 github.com/boynton/repl v0.0.0-20170116235056-348863958e3e h1:lFJi7V/jlH3FDeZxW0o/oMfKAjPyc/yifX2z8eBeLt8=
 github.com/boynton/repl v0.0.0-20170116235056-348863958e3e/go.mod h1:Crc/GCZ3NXDVCio7Yr0o+SSrytpcFhLmVCIzi0s49t4=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -14,14 +12,8 @@ github.com/gorilla/context v1.1.1 h1:AWwleXJkX/nhcU9bZSnZoi3h/qGYqQAGhq6zZe/aQW8
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/mux v1.6.2 h1:Pgr17XVTNXAk3q/r4CpKzC5xBM/qW1uVLV+IhRZpIIk=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
-github.com/jawher/mow.cli v1.0.4 h1:hKjm95J7foZ2ngT8tGb15Aq9rj751R7IUDjG+5e3cGA=
-github.com/jawher/mow.cli v1.0.4/go.mod h1:5hQj2V8g+qYmLUVWqu4Wuja1pI57M83EChYLVZ0sMKk=
-github.com/natefinch/lumberjack v2.0.0+incompatible h1:4QJd3OLAMgj7ph+yZTuX13Ld4UpgHp07nNdFX7mqFfM=
-github.com/natefinch/lumberjack v2.0.0+incompatible/go.mod h1:Wi9p2TTF5DG5oU+6YfsmYQpsTIOm0B1VNzQg9Mw6nPk=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
-github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 golang.org/x/crypto v0.0.0-20180910181607-0e37d006457b h1:2b9XGzhjiYsYPnKXoEfL7klWZQIt8IfyRCz62gCqqlQ=
@@ -30,10 +22,6 @@ golang.org/x/net v0.0.0-20180921000356-2f5d2388922f h1:QM2QVxvDoW9PFSPp/zy9FgxJL
 golang.org/x/net v0.0.0-20180921000356-2f5d2388922f/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sys v0.0.0-20180920110915-d641721ec2de h1:soC2mvPVpAV+Ld2qtpNn1eq25WTn76uIGNV23bofu6Q=
 golang.org/x/sys v0.0.0-20180920110915-d641721ec2de/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20181012201414-c0eb142035b5 h1:7biR/1TVYwx5G88SZ6YJWFybYq6HoQaa9VnemnXgyLo=
-golang.org/x/tools v0.0.0-20181012201414-c0eb142035b5/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=

utils/zpe-updater/cmd/tools/main.go

@@ -12,8 +12,8 @@ import (
 	"os"
 	"time"
 
-	"github.com/natefinch/lumberjack"
 	"github.com/yahoo/athenz/utils/zpe-updater"
+	"gopkg.in/natefinch/lumberjack.v2"
 )
 
 func main() {