Adjust Travis script according to uppercase test directories

Author: schmengler

Diff for: .travis/before_script.sh

@@ -45,7 +45,7 @@ composer dumpautoload
 # prepare for test suite
 case $TEST_SUITE in
     integration)
-        cp vendor/$COMPOSER_PACKAGE_NAME/tests/integration/phpunit.xml.dist dev/tests/integration/phpunit.xml
+        cp vendor/$COMPOSER_PACKAGE_NAME/tests/Integration/phpunit.xml.dist dev/tests/integration/phpunit.xml
 
         cd dev/tests/integration
 
@@ -63,6 +63,6 @@ case $TEST_SUITE in
         cd ../../..
     ;;
     unit)
-        cp vendor/$COMPOSER_PACKAGE_NAME/tests/unit/phpunit.xml.dist dev/tests/unit/phpunit.xml
+        cp vendor/$COMPOSER_PACKAGE_NAME/tests/Unit/phpunit.xml.dist dev/tests/unit/phpunit.xml
     ;;
 esac