VNAV-labs
                                
                                
                                
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                        Fix lab6 dependencies
This PR targets this issue. Things were done:
- Added cv_bridge_catkin directory into lab5/dependencies. It was downloaded from source repo from the noetic branch. Then cmake file was edited for linking to opencv3_catkin.
 - Updated cmake files for lab5 and lab6.
 - Updated packages files.
 
Remark: I have not checked how it will influence the further labs. As I have not implemented them yet.