Replaced fig.set_tight_layout(True) with matplotlib.rcParams['figure.…

[knutfrode]

…autolayout'] = True

[gauteh]

Second option is better! Then we don't change global plotting settings for users just by importing opendrift.

[knutfrode]

Yes, you are right. Still fails, but will look at it later.

[knutfrode]

It makes a minor difference if fig.set_layout_engine('tight') is executed before or after fig.canvas.draw() (one figure is slightly shifted vertically)

Keeping it as it was (set_layout before canvas.draw), the tests pass, since figures are unchanged. This is probably ok.