update tests/test_eigenvalue_solvers.py for eig.slepc
update tests/test_eigenvalue_solvers.py for eig.slepc

vlukes/sfepy,vlukes/sfepy,BubuLK/sfepy,vlukes/sfepy,rc/sfepy,sfepy/sfepy,sfepy/sfepy,rc/sfepy,sfepy/sfepy,rc/sfepy,BubuLK/sfepy,BubuLK/sfepy