Plot changes when DEFAULTS are not rebuild.

[germa89]

I had to make the plotting defaults...

pymapdl/src/ansys/mapdl/core/plotting/plotting_defaults.py

Lines 66 to 82 in 600d907

	class DefaultSymbol:
	# Class to store the symbols because of https://github.com/ansys/pymapdl/issues/2872
	# To solve that issue, we avoid having to load the pyvista attributes when the module is load.
	# Instead we set the parameters at calling
	def __init__(self):
	self._configured = False
	def __call__(self, name):
	if True: # not self._configured:
	self._set_configuration()
	self._configured = True
	return getattr(self, name)
	def _set_configuration(self):
	self._point = pv.Sphere(center=(0, 0, 0), radius=0.5)

to be reinstantiated every time they are called, in here:

c80bca6

Because I was having random changes in the plots:

Basically, the glyphs were offset as well as the legend glyps.

Clearly there is something in our tests that change the glyphs configuration. I do not have the time now to investigate.

Pinging @AlejandroFernandezLuces for awareness.