Add new LO detector, Fix bugs in commons-lang 2.x detectors, Fix typo

* Fix bugs in commons-lang 2.x equals/hash code detectors.

* Fix minor typo in detector message.

* Add new rule for detecting misuse of logger methods that result in lost exception stack traces.

```java
log.info(new Throwable()); // bad
log.info("Message", new Throwable()); // ok
```