fixed rtabmap_sync lib export, added rtabmap_ros namespace to MspManager class

src/MapsManager.cpp

@@ -56,6 +56,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 using namespace rtabmap;
 
+namespace rtabmap_ros {
+
 MapsManager::MapsManager() :
 		cloudOutputVoxelized_(true),
 		cloudSubtractFiltering_(false),
@@ -1557,3 +1559,5 @@ cv::Mat MapsManager::getGridProbMap(
 	return occupancyGrid_->getProbMap(xMin, yMin);
 }
 
+}  // namespace rtabmap_ros
+