Spectra with gaps not plotted properly

[rweigel]

server = 'http://hapi-server.org/servers-dev/TestData2.0/hapi'
dataset = 'dataset1'
parameter = 'spectra'
start = '1970-01-01T00:00:01Z'
stop = '1970-01-01T00:00:30Z'
opts = {'logging': True, 'usecache': True}

data, meta = hapi(server, dataset, parameter, start, stop, **opts)

popts = {'logging': True, 'returnimage': False, 'usecache': False}
hapiplot(data, meta, **popts)