Improve/external unit http client

.gitignore

.gitlab-ci.yml

.vscode/launch.json

CHAOSFramework.xcodeproj/project.pbxproj

...meworkTests/CHAOSFrameworkTests.xcodeproj/project.pbxproj

CHAOSFrameworkTests/FrameworkTest/CMakeLists.txt

...ameworkTest/direct_io/DirectIODeviceServerChannelTest.cpp

...ameworkTest/external_unit/ExternalUnitMulticlientTest.cpp

...orkTests/FrameworkTest/external_unit/ExternalUnitTest.cpp

CHAOSFrameworkTests/FrameworkTest/main.cpp

...FrameworkTests/FrameworkTest/utility/FutureHelperTest.cpp

CMakeLists.txt

chaos/common/ChaosCommon.h

chaos/common/configuration/GlobalConfiguration.cpp

chaos/common/configuration/GlobalConfiguration.h

chaos/common/cronus_manager/CronJob.h

chaos/common/data/cache/DataCache.cpp

chaos/common/data/entity/Entity.cpp

...mon/direct_io/DirectIOClientConnectionMetricCollector.cpp

chaos/common/external_unit/ExternalEchoEndpoint.cpp