rename StringUtils in string_utls

gcontini

2020-05-02 4bd7da9ff2eb06c11b1f54e2b8e2cfb44af56776

 src/library/base/CMakeLists.txt

@@ -1,7 +1,7 @@
ADD_LIBRARY(base OBJECT
    EventRegistry.cpp
    StringUtils.cpp
    file_utils.cpp
    string_utils.cpp
    base64.cpp
    logger.cpp
)