Fix lint errors introduced by begin/rescue block in read_configuration

.rubocop.yml

@@ -2,3 +2,5 @@ Metrics/MethodLength:
   Max: 25
 Metrics/AbcSize:
   Enabled: false
+Style/RedundantBegin:
+  Enabled: false

unipoly-mlmmj-ldap-sync

@@ -9,8 +9,8 @@ require 'net/ldap'
 def read_configuration(path)
   begin
     TOML.load_file(path)
-  rescue Errno::ENOENT => raisedError
-    puts "Could not open configuration file: #{raisedError}"
+  rescue Errno::ENOENT => raised_error
+    puts "Could not open configuration file: #{raised_error}"
     exit(1)
   end
 end