Problem::getState(structure) doesn't care about structure

In the case of non-empty ismotion processor list, the given structure is ignored and the whole problem structure is returned.

added To Do (release) bug labels

created merge request !379 (merged) to address this issue

mentioned in merge request !379 (merged)

mentioned in issue #344 (closed)

Need to fix plugin laser:

VectorComposite ProcessorOdomIcp::getState( const StateStructure& _structure ) const
VectorComposite ProcessorOdomIcp::getState(const TimeStamp& _ts, const StateStructure& _structure) const

closed via merge request !379 (merged)

mentioned in commit 96e068de