HTTP Manager: TLS + postForm + timeout + clearcookie + redirectstrategy

[Mark-J-Lawrence]

Why?

This PR delivers a number of changes which have been required whilst migrating our tests over from using the v4 HTTP client, and our own internal v5 HTTP client, over to the new public httpclient5 HTTP manager delivered in 0.47.0.

The changes are:

1. New text content types available to support return types by springboot 4 applications
2. The ability to set the connection request + response timeout manually via annotation metadata
3. The ability to set the socket and connection timeout via helper functions
4. A new postForm() handler which makes working with encoded forms a lot easier (simply provide a url and a key-value map for the form)
5. Latest TLS versions supported for the connection
6. A helper to clear cookies, which can be handy when testing authentication scenarios.
7. Better redirect support. Firstly, to enable it, secondly, a redirect strategy to handle when a redirect after authentication may go back to /, however, the trailing / is lost and it simply goes back to the baseUrl, causing failures.

Changes

• Unit tests (if applicable)
• Documentation updates (if applicable)
• Release notes updates (if applicable)

[eamansour]

Thanks for contributing these changes, Mark! They look great overall, just a couple of very minor comments - I'll be happy to approve once they're sorted out