minor #6895 fixing $formatLevelMap array values (zrashwani)

This PR was submitted for the 3.1 branch but it was merged into the 2.7 branch instead (closes #6895).

Discussion
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fixing $formatLevelMap array values

Logically the values of `$formatLevelMap` array were switched,
`LogLevel::CRITICAL` key should have value `ConsoleLogger::ERROR` and
`LogLevel::DEBUG` key should have value `ConsoleLogger::INFO`

Commits
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0f56c3c fixing $formatLevelMap array values

components/console/logger.rst

@@ -98,8 +98,8 @@ constructor::
 
     // ...
     $formatLevelMap = array(
-        LogLevel::CRITICAL => ConsoleLogger::INFO,
-        LogLevel::DEBUG    => ConsoleLogger::ERROR,
+        LogLevel::CRITICAL => ConsoleLogger::ERROR,
+        LogLevel::DEBUG    => ConsoleLogger::INFO,
     );
     $logger = new ConsoleLogger($output, array(), $formatLevelMap);