duplicate column name when container restarts

[helmutkemper]

When the container restarts, the ALTER TABLE ... command generates the error: duplicate column name: cluster_size

[jorgebay]

Nice findings @helmutkemper !

This issue is on master but not on v0.4.1, I'll add it to the upcoming v0.5.0 release, per our discussions, assign it to you :)

[jorgebay]

We could add a test to cover this issue here.

Something like:

Describe("Init()", func() {
	It("should support running multiple times", func() {
		client := NewClient(&testConfig{}).(*client)
		err := client.Init()
		Expect(client.Init()).NotTo(HaveOccurred())

		// Running a second time
		err = client.Init()
		Expect(err).NotTo(HaveOccurred())
	})
})