Bugs with certain input data for LoewnerReductor

[artpelling]

I've found several cases that lead to errors with LoewnerReductor.

from pymor.reductors.loewner import LoewnerReductor


n = 100
s = (np.arange(n)+1)*1j
Hs = np.random.rand(n, 3, 1)

# BUG 1 about types
L = LoewnerReductor(s, Hs, mimo_handling='random') # this works
#rom = L.reduce()

L = LoewnerReductor(s, Hs, mimo_handling='full') # this doesn't
#rom = L.reduce()


# BUG 2 about shapes
Hs = np.random.rand(n, 3, 1) + 1j # add 1j to make complex

L = LoewnerReductor(s, Hs) # this works
rom = L.reduce()

Hs = Hs.transpose(0, 2, 1)
L = LoewnerReductor(s, Hs) # this doesn't
rom = L.reduce()

@lbalicki We should fix those and add tests for them!