Configure default color maps

[forman]

Expected behavior

For given variable names, Cate should use a default color map in case no color map has been specified for a given operation. This applies to various plot_<x>() operations and the 3D globe display in the GUI.

See also

• Land Cover CCI display must use dedicated color map #364
• Allow mapping dataset variables to extra metadata #114 (similar issue)

Actual behavior

Default color map is jet. Note, the GUI remembers the last color map used on a variable (in user preferences).

Steps to reproduce the problem

1. Open dataset in Cate Desktop
2. Select any geo-spatial variable
3. Verify that default color map jet is applied

Specifications

Cate 0.9.0.dev7