BufferOverflowException in PasswordGenerator when given rules enforce a longer password than the requests length

[tombueng]

When the given rules need more chars than requested a BufferOverflowException occurs.

new PasswordGenerator().generatePassword(5,new CharacterRule(EnglishCharacterData.LowerCase,10));

java.nio.BufferOverflowException
	at java.base/java.nio.Buffer.nextPutIndex(Buffer.java:714)
	at java.base/java.nio.HeapCharBuffer.put(HeapCharBuffer.java:212)
	at java.base/java.nio.CharBuffer.append(CharBuffer.java:1800)
	at java.base/java.nio.CharBuffer.append(CharBuffer.java:266)
	at org.passay.PasswordGenerator.fillRandomCharacters(PasswordGenerator.java:100)
	at org.passay.PasswordGenerator.generatePassword(PasswordGenerator.java:77)
	at org.passay.PasswordGenerator.generatePassword(PasswordGenerator.java:53)

I think the expected result should be a password that fits the given rules even if it will be longer than requested.

[dfish3r]

Fixed in #130