Reduce the number of cards tested in import/export tests

There is no need to have so many cards tested in the test, just
a few will do to prove the point.

Author: Branden Archer

app/src/test/java/protect/card_locker/ImportExportTest.java

@@ -109,7 +109,7 @@ private void clearDatabase()
     @Test
     public void multipleCardsExportImport() throws IOException
     {
-        final int NUM_CARDS = 1000;
+        final int NUM_CARDS = 10;
 
         for(DataFormat format : DataFormat.values())
         {
@@ -144,7 +144,7 @@ public void multipleCardsExportImport() throws IOException
     @Test
     public void importExistingCardsNotReplace() throws IOException
     {
-        final int NUM_CARDS = 1000;
+        final int NUM_CARDS = 10;
 
         for(DataFormat format : DataFormat.values())
         {
@@ -177,7 +177,7 @@ public void importExistingCardsNotReplace() throws IOException
     @Test
     public void corruptedImportNothingSaved() throws IOException
     {
-        final int NUM_CARDS = 1000;
+        final int NUM_CARDS = 10;
 
         for(DataFormat format : DataFormat.values())
         {