Added HTTP Secured Source Kamelet

docs/modules/ROOT/pages/http-secured-source.adoc

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+// THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT
+= image:kamelets/http-secured-source.svg[] HTTP Secured Source
+
+*Provided by: "Apache Software Foundation"*
+
+Periodically fetches a secured HTTP resource and provides the content as output.
+
+== Configuration Options
+
+The following table summarizes the configuration options available for the `http-secured-source` Kamelet:
+[width="100%",cols="2,^2,3,^2,^2,^3",options="header"]
+|===
+| Property| Name| Description| Type| Default| Example
+| *url {empty}* *| URL| The URL to fetch for data| string| | `"https://gist.githubusercontent.com/nicolaferraro/e3c72ace3c751f9f88273896611ce5fe/raw/3b6f54060bacb56b6719b7386a4645cb59ad6cc1/quote.json"`
+| authMethod| Authentication Method| Authentication methods allowed to use as a comma separated list of values Basic, Digest or NTLM.| string| `"Basic"`| 
+| authPassword| Authentication Password| Authentication password| string| | 
+| authUsername| Authentication Username| Authentication username| string| | 
+| authenticationPreemptive| Authentication Preemptive| If this option is true, camel-http sends preemptive basic authentication to the server.| boolean| `false`| 
+| contentType| Content Type| The content type accepted for the resource| string| `"application/json"`| 
+| period| Period between Updates| The interval between fetches in milliseconds| integer| `10000`| 
+|===
+
+NOTE: Fields marked with ({empty}*) are mandatory.
+
+== Usage
+
+This section summarizes how the `http-secured-source` can be used in various contexts.
+
+=== Knative Source
+
+The `http-secured-source` Kamelet can be used as Knative source by binding it to a Knative object.
+
+.http-secured-source-binding.yaml
+[source,yaml]
+----
+apiVersion: camel.apache.org/v1alpha1
+kind: KameletBinding
+metadata:
+  name: http-secured-source-binding
+spec:
+  source:
+    ref:
+      kind: Kamelet
+      apiVersion: camel.apache.org/v1alpha1
+      name: http-secured-source
+    properties:
+      url: "https://gist.githubusercontent.com/nicolaferraro/e3c72ace3c751f9f88273896611ce5fe/raw/3b6f54060bacb56b6719b7386a4645cb59ad6cc1/quote.json"
+  sink:
+    ref:
+      kind: InMemoryChannel
+      apiVersion: messaging.knative.dev/v1
+      name: mychannel
+
+----
+
+Make sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.
+
+Save the `http-secured-source-binding.yaml` file into your hard drive, then configure it according to your needs.
+
+You can run the source using the following command:
+
+[source,shell]
+----
+kubectl apply -f http-secured-source-binding.yaml
+----
+// THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT