HTTP Useragent test fail

[BernhardtD]

The useragent tests fail with the following responses:

[  FAILED  ] 3 tests, listed below:
[  FAILED  ] premake_http.http_get
...e/daniel/workspace/premake-core/tests/base/test_http.lua:19: (1) expected:
{
...but was:
{"user-agent":"Premake/5.0.0-dev"}
fulltext:
{"user-agent":"Premake/5.0.0-dev"}

stack traceback:
	...e/daniel/workspace/premake-core/tests/base/test_http.lua:19: in function 'testFunction'
[  FAILED  ] premake_http.https_get
...e/daniel/workspace/premake-core/tests/base/test_http.lua:33: (1) expected:
{
...but was:
{"user-agent":"Premake/5.0.0-dev"}
fulltext:
{"user-agent":"Premake/5.0.0-dev"}

stack traceback:
	...e/daniel/workspace/premake-core/tests/base/test_http.lua:33: in function 'testFunction'
[  FAILED  ] premake_http.https_get_verify_peer
...e/daniel/workspace/premake-core/tests/base/test_http.lua:45: (1) expected:
{
...but was:
{"user-agent":"Premake/5.0.0-dev"}
fulltext:
{"user-agent":"Premake/5.0.0-dev"}

stack traceback:
	...e/daniel/workspace/premake-core/tests/base/test_http.lua:45: in function 'testFunction'

 3 FAILED TESTS

It seems that the httpbin response format of the useragent request has been changed.