Enforce minimum KF5 version properly

CMakeLists.txt

@@ -14,10 +14,10 @@ set (MINUET_VERSION "0.4.0.${RELEASE_SERVICE_COMPACT_VERSION}")
 
 project(minuet VERSION ${MINUET_VERSION})
 
-set(ECM_MIN_VERSION "5.15.0")
+set(KF5_MIN_VERSION "5.15.0")
 set(QT_MIN_VERSION "5.7.0")
 
-find_package(ECM ${ECM_MIN_VERSION} CONFIG REQUIRED)
+find_package(ECM ${KF5_MIN_VERSION} CONFIG REQUIRED)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH}  ${minuet_SOURCE_DIR}/cmake)
 
 include(GenerateExportHeader)