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/ldap_config.cpp b/phosphor-ldap-config/ldap_config.cpp
index 97e23ca..b7bd4c6 100644
--- a/phosphor-ldap-config/ldap_config.cpp
+++ b/phosphor-ldap-config/ldap_config.cpp
@@ -25,8 +25,8 @@
 {
 
 constexpr auto nslcdService = "nslcd.service";
-constexpr auto LDAPscheme = "ldap";
-constexpr auto LDAPSscheme = "ldaps";
+constexpr auto ldapScheme = "ldap";
+constexpr auto ldapsScheme = "ldaps";
 constexpr auto certObjPath = "/xyz/openbmc_project/certs/client/ldap/1";
 constexpr auto certRootPath = "/xyz/openbmc_project/certs/client/ldap";
 constexpr auto authObjPath = "/xyz/openbmc_project/certs/authority/ldap";
@@ -362,11 +362,11 @@
         {
             return value;
         }
-        if (isValidLDAPURI(value, LDAPSscheme))
+        if (isValidLDAPURI(value, ldapsScheme))
         {
             secureLDAP = true;
         }
-        else if (isValidLDAPURI(value, LDAPscheme))
+        else if (isValidLDAPURI(value, ldapScheme))
         {
             secureLDAP = false;
         }
@@ -717,11 +717,11 @@
             cereal::BinaryInputArchive iarchive(is);
             iarchive(*this);
 
-            if (isValidLDAPURI(ldapServerURI(), LDAPscheme))
+            if (isValidLDAPURI(ldapServerURI(), ldapScheme))
             {
                 secureLDAP = false;
             }
-            else if (isValidLDAPURI(ldapServerURI(), LDAPSscheme))
+            else if (isValidLDAPURI(ldapServerURI(), ldapsScheme))
             {
                 secureLDAP = true;
             }