correct (more usable) conversion of ldap entry attributes to string

[mike-hmelov]

Currently method which is used in
^entity contains attribute "([a-zA-Z][a-zA-Z0-9-])" with value "(.)"$
step uses simple toString on attribute value
So toString'ed byte[] values look like that - [B@e874448

This fix converts

• byte[] and char[] array attribute value to String using UTF-8
• other array type values will look like {<el1.toString()>, <el2.toString()>...}