Update Dockerfile to 4.10

[mdbooth]

What this PR does / why we need it:

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1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

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[pierreprinetti]

Please reflect the Go version bump in go.mod:

diff --git a/go.mod b/go.mod
index 9c5f3088..30381b91 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module shiftstack/machine-api-provider-openstack
 
-go 1.15
+go 1.17
 
 require (
 	github.com/ajeddeloh/go-json v0.0.0-20170920214419-6a2fe990e083 // indirect

and then run a good go mod tidy

[mdbooth]

/lgtm

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/lgtm

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[pierreprinetti]

/lgtm
This will merge as soon as master is open.