[BZ 1080909] DynaGroup expression evaluator is not strict when grouping by
resource configuration property

Dynagroup expressions using  pluginConfiguration[prop] or
resourceConfiguratoin[prop] will now be matched 'strict' to property name.
Strict match in means resulting SQL would be 'simple.name = :argX' instead
of original 'simple.name LIKE :argX'.
Merge pull request #16 from lzoubek/bugs/1080909

[BZ 1080909] DynaGroup expression evaluator is not strict when grouping by resource configuration property