Require UMFPACK explicitly in some Nedelec element tests.

diff --git a/tests/fe/curl_curl_01.output b/tests/fe/curl_curl_01.with_umfpack=on.output
similarity index 100%
rename from tests/fe/curl_curl_01.output
rename to tests/fe/curl_curl_01.with_umfpack=on.output

diff --git a/tests/fe/nedelec_non_rect_2d.output b/tests/fe/nedelec_non_rect_2d.with_umfpack=on.output
similarity index 100%
rename from tests/fe/nedelec_non_rect_2d.output
rename to tests/fe/nedelec_non_rect_2d.with_umfpack=on.output

diff --git a/tests/fe/nedelec_non_rect_face.output b/tests/fe/nedelec_non_rect_face.with_umfpack=on.output
similarity index 100%
rename from tests/fe/nedelec_non_rect_face.output
rename to tests/fe/nedelec_non_rect_face.with_umfpack=on.output