fix(runtime): ignore charset for Content-Type comparison (#951)

[jrtitus]

Fixes #951

Signed-off-by: Jeff Titus [email protected]

PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• I am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?)
• None affected. All tests pass with same coverage.
• I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• I have opened a PR for the related docs change (if not, why?)
• No docs change required.
  

Testing Instructions

Tested scenario using local build

require github.com/edgexfoundry/app-functions-sdk-go/v2 v2.0.0
replace github.com/edgexfoundry/app-functions-sdk-go/v2 v2.0.0 => ../app-functions-sdk-go

# With charset
$ http :59770/api/v2/trigger Content-Type:"application/json; charset=utf-8" action=set deviceName=SomeDevice commandName=SomeCommand resourceName=SomeResource value=45
HTTP/1.1 200 OK
Content-Length: 36
Content-Type: application/json
Date: Fri, 17 Sep 2021 18:21:19 GMT

{
    "apiVersion": "v2",
    "statusCode": 200
}

# Without charset
$ http :59770/api/v2/trigger Content-Type:"application/json" action=set deviceName=SomeDevice commandName=SomeCommand resourceName=SomeResource value=45
HTTP/1.1 200 OK
Content-Length: 36
Content-Type: application/json
Date: Fri, 17 Sep 2021 18:21:19 GMT

{
    "apiVersion": "v2",
    "statusCode": 200
}

New Dependency Instructions (If applicable)

[codecov-commenter]

Codecov Report

Merging #952 (2e70cc3) into main (b86fbeb) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #952      +/-   ##
==========================================
+ Coverage   65.87%   65.89%   +0.01%     
==========================================
  Files          33       33              
  Lines        2532     2533       +1     
==========================================
+ Hits         1668     1669       +1     
  Misses        764      764              
  Partials      100      100              

Impacted Files	Coverage Δ
internal/runtime/runtime.go	76.95% <100.00%> (+0.10%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b86fbeb...2e70cc3. Read the comment docs.

[lenny-goodell]

LGTM