714 Use IC io load_dst instead of pandas read_hdf to load PSFs

[author: aretno]
The use of read_hdf function as it is fails in higher pandas
versions. This uses the standard IC function to load dataframes to
discouple the version problem from beersheba city.

[reviewer: mmkekic]
This PR fixes the reader of psf_file that was doomed to fail in more
recent pandas version. Good job, we are one step closer to updating
our environment!

invisible_cities/cities/beersheba.py

@@ -47,6 +47,7 @@
 from .. io.       mcinfo_io    import mc_info_writer
 from .. io.run_and_event_io    import run_and_event_writer
 from .. io.          dst_io    import store_pandas_as_tables
+from .. io.          dst_io    import load_dst
 
 from .. evm.event_model        import HitEnergy
 
@@ -110,7 +111,7 @@ def deconvolve_signal(psf_fname       : str,
     bin_size      = np.asarray(bin_size               )
     diffusion     = np.asarray(diffusion              )
 
-    psfs          = pd.read_hdf(psf_fname)
+    psfs          = load_dst(psf_fname, 'PSF', 'PSFs')
     deconvolution = deconvolve(n_iterations, iteration_tol, sample_width, bin_size, inter_method)
 
     if energy_type  not in HitEnergy          :