#1320 Enhance SimplifyBooleanReturns checks

[michael beaumont]

SimplifyBooleanReturns does not handle the scenario when no else statement is present. Request to add in a check that would flag this method

public boolean exists(Object obj) { 
    if (myObjectList.contains(obj)) { 
    return true;
    } 
    return false;
}

[Andreas Dangel]

Will be included with the next release.