Adding a definition for MetalLB

definitions/metallb/README.md

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+# MetalLB
+
+This [Fabrikate](https://github.com/microsoft/fabrikate) definition generates the Kubernetes resource manifests for [MetalLB](https://github.com/danderson/metallb).
+
+## Usage
+
+Add the following to your component.yaml:
+
+```yaml
+subcomponents:
+  - name: "metallb"
+    source: "https://github.com/microsoft/fabrikate-definitions.git"
+    path: "definitions/metallb"
+    method: "git"
+```
+
+### Setting Up MetalLB
+
+This definition uses Helm for installation and management of MetalLB. Documentation can be found in the [Helm Charts Repo](https://github.com/helm/charts/tree/master/stable/metallb).
+
+It is recommended you change the configuration to suit your own needs. This can be achieved using the `configInLine` stanza in your `common.yaml` like so:
+
+```yaml
+metallb:
+  config:
+    configInLine:
+      address-pools:
+          - name: default-ip-space
+            protocol: layer2
+            addresses:
+            - 10.0.1.10-10.0.1.99
+```

definitions/metallb/component.yaml

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+{
+  "name": "fabrikate-metallb",
+  "generator": "static",
+  "path": "./manifests",
+  "subcomponents": [
+    {
+      "name": "metallb",
+      "generator": "helm",
+      "source": "https://github.com/helm/charts",
+      "method": "git",
+      "path": "stable/metallb"
+    }
+  ]
+}

definitions/metallb/config/common.yaml

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+config:
+subcomponents:
+  metallb:
+    namespace: metallb-system
+    injectNamespace: true

definitions/metallb/manifests/metallb-namespace.yml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: metallb-system