Fix 'The file is locked: nio:' exceptions in Hg19 tests by closing Mv…

…Store in MvStoreDataSourceLoaderTest

exomiser-spring-boot-autoconfigure/src/test/java/org/monarchinitiative/exomiser/autoconfigure/genome/MvStoreDataSourceLoaderTest.java

@@ -1,7 +1,7 @@
 /*
  * The Exomiser - A tool to annotate and prioritize genomic variants
  *
- * Copyright (c) 2016-2018 Queen Mary University of London.
+ * Copyright (c) 2016-2021 Queen Mary University of London.
  * Copyright (c) 2012-2016 Charité Universitätsmedizin Berlin and Genome Research Ltd.
  *
  * This program is free software: you can redistribute it and/or modify
@@ -40,6 +40,7 @@ public void loadsData() {
         Path mvStorePath = Paths.get("src/test/resources/data/1710_hg19/1710_hg19_variants.mv.db");
         MVStore mvStore = MvStoreDataSourceLoader.openMvStore(mvStorePath);
         assertThat(mvStore, instanceOf(MVStore.class));
+        mvStore.close();
     }
 
     @Test