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.hpp b/phosphor-ldap-config/utils.hpp
index 984aae6..b1450b7 100644
--- a/phosphor-ldap-config/utils.hpp
+++ b/phosphor-ldap-config/utils.hpp
@@ -14,7 +14,7 @@
  *       against LDAPS type URI, for LDAP type URI it is equals to "ldap".
  *  @returns true if it is valid otherwise false.
  */
-bool isValidLDAPURI(const std::string& URI, const char* scheme);
+bool isValidLDAPURI(const std::string& uri, const char* scheme);
 
 } // namespace ldap
 } // namespace phosphor