Introduce unit-testing through the Ginkgo BDD framework

[RobotSail]

This PR aims to introduce behavior-driven development (BDD) through the usage of Ginkgo + Gomega.

A test scenario is created with the

var _ = Describe("my component", func() {
  // test flow here
})

blocks.

Simply instantiate the structs, populate them with the data pertinent to your scenario, and create It statements to describe what "it" does.

For example, the IpfsReconciler.ConfigMapScripts method has one of its behaviors described like so:

When("ConfigMapScripts are edited", func() {
  const myName = "my-fav-ipfs-node"
  BeforeEach(func() {
	  // uses the name
	  ipfs.Name = myName
  })
  
  It("contains the IPFS resource name", func() {
	  fn, name := ipfsReconciler.ConfigMapScripts(ctx, ipfs, configMap)
	  Expect(fn).NotTo(BeNil())
	  Expect(fn()).NotTo(HaveOccurred())
	  Expect(name).To(Equal("ipfs-cluster-scripts-" + myName))
  })
})

Fixes #22