add DERIVED_DATA_PATH caps (#75)

* add  DERIVED_DATA_PATH caps

* typo

Author: SvetoslavTsenov

src/main/java/functional/tests/core/mobile/appium/Capabilities.java

@@ -119,6 +119,9 @@ public DesiredCapabilities loadIOSCapabilities(MobileSettings settings) {
         capabilities.setCapability(IOSMobileCapabilityType.WDA_STARTUP_RETRIES, 5);
         capabilities.setCapability(IOSMobileCapabilityType.SHOULD_USE_SINGLETON_TESTMANAGER, false);
 
+        if (!System.getenv("DERIVED_DATA_PATH").isEmpty()) {
+            capabilities.setCapability("derivedDataPath", System.getenv("DERIVED_DATA_PATH") + File.separator + settings.deviceId);
+        }
         // It looks we need it for XCTest (iOS 10+ automation)
         if (settings.platformVersion >= 10) {
             int port = settings.ios.wdaLocalPort;