Rename LibreOffice Basic test files from .vb to .bas: they are not VBA

Change-Id: I4ff8a8dc855da2c60084318e067d4ec8149d055e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118330
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Jenkins

basic/qa/basic_coverage/test_getsolarversion_method.bas

@@ -0,0 +1,15 @@
+' This file is part of the LibreOffice project.
+'
+' This Source Code Form is subject to the terms of the Mozilla Public
+' License, v. 2.0. If a copy of the MPL was not distributed with this
+' file, You can obtain one at http://mozilla.org/MPL/2.0/.
+'
+
+Function doUnitTest as String
+    ' GetSolarVersion
+    If ( GetSolarVersion() < 50000) Then
+        doUnitTest = "FAIL"
+    Else
+        doUnitTest = "OK"
+    End If
+End Function