PUT/GET/PATCH/DELETE verbs not working

[kulkeez]

Cherry-picking of jmeter-http2-plugin Pull8 and 10 to be done to HPE branch.

1. jmeter-http2-plugin: Added buildGetRequest() static method Blazemeter/jmeter-http2-plugin#8
2. jmeter-http2-plugin: modify PUT method to have data frame Blazemeter/jmeter-http2-plugin#10