clang-tidy: enable clang-tidy

Enable the first check: readability-identifier-naming

Also fixed all check failures.

Tested:
1. compiles, no clang-tidy failures
2. the two daemons work correctly on hardware regarding DBus APIs

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: Ic415e857726e8f521c1d61a3e7f0c85121c0d284
diff --git a/phosphor-ldap-config/utils.cpp b/phosphor-ldap-config/utils.cpp
index 66e1474..4ad69d9 100644
--- a/phosphor-ldap-config/utils.cpp
+++ b/phosphor-ldap-config/utils.cpp
@@ -14,7 +14,7 @@
 namespace ldap
 {
 
-bool isValidLDAPURI(const std::string& URI, const char* scheme)
+bool isValidLDAPURI(const std::string& uri, const char* scheme)
 {
     // Return false if the user tries to configure port 0
     // This check is not done in line 42, because ldap_url_parse
@@ -22,14 +22,14 @@
     // will always return true (thus allowing the user to
     // configure port 0)
 
-    if (boost::algorithm::ends_with(URI, ":0"))
+    if (boost::algorithm::ends_with(uri, ":0"))
     {
         return false;
     }
 
     LDAPURLDesc* ludpp = nullptr;
     int res = LDAP_URL_ERR_BADURL;
-    res = ldap_url_parse(URI.c_str(), &ludpp);
+    res = ldap_url_parse(uri.c_str(), &ludpp);
 
     auto ludppCleanupFunc = [](LDAPURLDesc* ludpp) {
         ldap_free_urldesc(ludpp);