Update httpcomponents:

httpcomponents-core to 4.2.5
httpcomponents-httpclient to 4.2.6
HTTPCLIENT-1346
Merge pull request #6522 from liweinan/BZ1078186

[WFLY-3641] Upgrade httpcomponents
Don't hardwire the wildfly-legacy version
Merge pull request #6525 from kabir/dont-hardwire-wf-legacy-version

Don't hardwire the wildfly-legacy version