Replacing current instrument price engine with a simpler desgin. With
the onTick method one avoids checking for null ticks or disconnects
because the tick provider will do this beforehand. The feature needs UT
adaptaions.
Changed class name LastTickProvider results in better intent.
Changed interface mappings.
Bug fix: removed jforexplatform constructot argument.
Implemented the PriceEngine with the new design of consumer/producer.
This greatly simplifies implementation and performance.
Bug fix: new on tick was not added to map.
Merge remote-tracking branch 'origin/feat/TickFetch'
Removed no more needed debug log print.