Allow sending GET requests with a body

[ceciliaavila]

#minor

Description

This PR allows sending GET requests by adding a body to the request's content.

Composer related issue: #9158.

Specific Changes

• Modified the switch clause to move the GET request case, to allow the body to be added to the request content.

Testing

The following image shows the GET request sent with a body in the content.

[coveralls]

Pull Request Test Coverage Report for Build 352201

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.006%) to 78.989%

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Files with Coverage Reduction	New Missed Lines	%
/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/Actions/HttpRequest.cs	1	87.93%

Totals
Change from base Build 351887:	0.006%
Covered Lines:	25917
Relevant Lines:	32811

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💛 - Coveralls