Two tests had the same name in arnoldi module.

Change-Id: I9d99e90fe0c2e6034ba446db77bea017646da30f

diff --git a/scilab/modules/arnoldi/tests/nonreg_tests/dsaupd.dia.ref b/scilab/modules/arnoldi/tests/nonreg_tests/bug_dsaupd.dia.ref
similarity index 100%
rename from scilab/modules/arnoldi/tests/nonreg_tests/dsaupd.dia.ref
rename to scilab/modules/arnoldi/tests/nonreg_tests/bug_dsaupd.dia.ref

diff --git a/scilab/modules/arnoldi/tests/nonreg_tests/dsaupd.tst b/scilab/modules/arnoldi/tests/nonreg_tests/bug_dsaupd.tst
similarity index 100%
rename from scilab/modules/arnoldi/tests/nonreg_tests/dsaupd.tst
rename to scilab/modules/arnoldi/tests/nonreg_tests/bug_dsaupd.tst