Fix build with OpenEXR>=3

Index: plugins/colorengines/lcms2/tests/CMakeLists.txt
--- plugins/colorengines/lcms2/tests/CMakeLists.txt.orig
+++ plugins/colorengines/lcms2/tests/CMakeLists.txt
@@ -12,7 +12,7 @@ include_directories( ../colorspaces/cmyk_u16
     ../colorprofiles
     ..
 )
-if(OPENEXR_FOUND)
+if(OpenEXR_FOUND)
     include_directories(${OPENEXR_INCLUDE_DIR})
 endif()
 include_directories( ${PIGMENT_INCLUDES} ${LCMS2_INCLUDE_DIR} )
@@ -33,14 +33,14 @@ endmacro()
 
 ########### next target ###############
 
-colorengine_lcms_add_unit_test(TestKoLcmsColorProfile
+colorengine_lcms_add_unit_test(colorengine_TestKoLcmsColorProfile
     TestKoLcmsColorProfile.cpp
     LINK_LIBRARIES kowidgets pigmentcms KF5::I18n ${LCMS2_LIBRARIES} Qt5::Test
 )
 
 ########### next target ###############
 
-colorengine_lcms_add_unit_test(TestKoColorSpaceRegistry
+colorengine_lcms_add_unit_test(colorengine_TestKoColorSpaceRegistry
     TestKoColorSpaceRegistry.cpp
     LINK_LIBRARIES kowidgets pigmentcms KF5::I18n ${LCMS2_LIBRARIES} Qt5::Test
 )
