tests: fix tests (a race on colliding test adf files).

2 unit test were using the same adf filenames as test
devices, so the tests, when executed in parallel
(building debs) were failing. Fixed making unique filenames.

Author: t-w

tests/test_dev_mount.c

@@ -36,22 +36,22 @@ END_TEST
 START_TEST ( test_dev_mount_valid_chksums )
 {
     test_data_t test_data[] = {
-        {   .adfname = "anexistent1.adf",
+        {   .adfname = "test_dev_mount_anexistent1.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READONLY,
             .ignoreChecksumErrors = false
         },
-        {   .adfname = "anexistent2.adf",
+        {   .adfname = "test_dev_mount_anexistent2.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READONLY,
             .ignoreChecksumErrors = true
         },
-        {   .adfname = "anexistent3.adf",
+        {   .adfname = "test_dev_mount_anexistent3.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READWRITE,
             .ignoreChecksumErrors = false
         },
-        {   .adfname = "anexistent4.adf",
+        {   .adfname = "test_dev_mount_anexistent4.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READWRITE,
             .ignoreChecksumErrors = true

tests/test_dev_open.c

@@ -67,22 +67,22 @@ END_TEST
 START_TEST ( test_dev_open_existent )
 {
     test_data_t test_data[] = {
-        {   .adfname = "anexistent1.adf",
+        {   .adfname = "test_dev_open_anexistent1.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READONLY,
             .ignoreChecksumErrors = false
         },
-        {   .adfname = "anexistent2.adf",
+        {   .adfname = "test_dev_open_anexistent2.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READONLY,
             .ignoreChecksumErrors = true
         },
-        {   .adfname = "anexistent3.adf",
+        {   .adfname = "test_dev_open_anexistent3.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READWRITE,
             .ignoreChecksumErrors = false
         },
-        {   .adfname = "anexistent4.adf",
+        {   .adfname = "test_dev_open_anexistent4.adf",
             .volname = "AnExitentVolume",
             .openMode = ADF_ACCESS_MODE_READWRITE,
             .ignoreChecksumErrors = true