String representation with new configuration

[gubaidulinvadim]

from pyaml.accelerator import Accelerator
sr = Accelerator.load("tests/config/EBSOrbit.yaml")
SR = sr.design
print( SR.get_bpm("BPM_C04-04") )

before:

BPM(peer='Simulator:design', name='BPM_C04-04', description=None, lattice_names=None, x_pos='srdiag/bpm/c04-04/SA_HPosition', y_pos='srdiag/bpm/c04-04/SA_VPosition', x_offset=None, y_offset=None, tilt=None)

after:

BPM(name='BPM_C04-04')

Originally posted by @JeanLucPons in #330 (comment)