Added test cases for RetryExec, ServiceUnavailableRetryExec, and MinimalClientExec

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512337 13f79535-47bb-0310-9956-ffa450edef68
Fixed some deprecation and varargs cast warnings; removed deprecated mock classes

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512339 13f79535-47bb-0310-9956-ffa450edef68
Removed references to deprecated code from HC fluent module

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512340 13f79535-47bb-0310-9956-ffa450edef68
Disabled test case failing in Continuum CI

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512341 13f79535-47bb-0310-9956-ffa450edef68
Fixed duplicate N&L problem by removing maven-notice-plugin in favor of maven-remote-resource-plugin included through Apache parent POM

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512361 13f79535-47bb-0310-9956-ffa450edef68