[por_upstream_sync branch] Tests failing

[130s]

Recently merged #21 that went into por_upstream_sync branch, not the default branch, broke the test cases #21 (comment). Though we're not sure the effect of those failing functionalities yet, we should fix them.

points_cloud_1                FAILED : Expect average color of [ 125.  116.  102.] (+-2.000). Got average of [ 127.82555213  116.97886198  103.44018592].
align_depth_ir1_1             FAILED : 'num_channels'
static_tf_1                   FAILED : Tf is None for couple camera_infra1_frame->camera_color_frame
depth_decimation_1            FAILED : 'num_channels'
align_depth_ir1_decimation_1  FAILED : 'num_channels'