Merge branch 'develop' into feature/addRouter

# Conflicts:
#	cluster/directory/base_directory.go
#	cluster/router/chain/factory.go
#	cluster/router/router.go
#	common/extension/router_factory.go
#	common/url.go

go.sum

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@@ -112,12 +110,8 @@ github.com/dubbogo/gost v1.5.2 h1:ri/03971hdpnn3QeCU+4UZgnRNGDXLDGDucR/iozZm8=
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@@ -152,7 +146,6 @@ github.com/gocql/gocql v0.0.0-20180617115710-e06f8c1bcd78/go.mod h1:4Fw1eo5iaEhD
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@@ -191,9 +184,6 @@ github.com/gophercloud/gophercloud v0.0.0-20180828235145-f29afc2cceca/go.mod h1:
 github.com/gopherjs/gopherjs v0.0.0-20180825215210-0210a2f0f73c/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
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@@ -329,7 +319,6 @@ github.com/lestrrat/go-strftime v0.0.0-20180220042222-ba3bf9c1d042 h1:Bvq8AziQ5j
 github.com/lestrrat/go-strftime v0.0.0-20180220042222-ba3bf9c1d042/go.mod h1:TPpsiPUEh0zFL1Snz4crhMlBe60PYxRHr5oFF3rRYg0=
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 github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
@@ -372,22 +361,16 @@ github.com/nicolai86/scaleway-sdk v1.10.2-0.20180628010248-798f60e20bb2/go.mod h
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@@ -399,11 +382,9 @@ github.com/patrickmn/go-cache v0.0.0-20180527043350-9f6ff22cfff8 h1:BR6MM54q4W9p
 github.com/patrickmn/go-cache v0.0.0-20180527043350-9f6ff22cfff8/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
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@@ -425,7 +406,6 @@ github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R
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@@ -460,7 +440,6 @@ github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4k
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@@ -480,7 +459,6 @@ github.com/toolkits/concurrent v0.0.0-20150624120057-a4371d70e3e3 h1:kF/7m/ZU+0D
 github.com/toolkits/concurrent v0.0.0-20150624120057-a4371d70e3e3/go.mod h1:QDlpd3qS71vYtakd2hmdpqhJ9nwv6mD6A30bQ1BPBFE=
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@@ -559,7 +537,6 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0
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