Catch null reference in case no vc cache is defined

Change-Id: I6dda338e03e46030f2b6d2741cef73d9e1bbf71d
diff --git a/src/test/resources/ehcache.xml b/src/test/resources/ehcache.xml
deleted file mode 100644
index b293534..0000000
--- a/src/test/resources/ehcache.xml
+++ /dev/null
@@ -1,22 +0,0 @@
-<ehcache xsi:noNamespaceSchemaLocation="http://www.ehcache.org/ehcache.xsd"
-	updateCheck="true" monitoring="autodetect" dynamicConfig="true">
-
-	<diskStore path="./krill_cache" />
-
-	<defaultCache 
-		maxEntriesLocalHeap="0" 
-		eternal="false"
-		timeToIdleSeconds="1200" 
-		timeToLiveSeconds="1200">
-	</defaultCache>
-
-	<cache name="named_vc" 
-		eternal="true" 
-		memoryStoreEvictionPolicy="LRU"
-		maxElementsInMemory="1" 
-		maxBytesLocalDisk="1G"
-		diskExpiryThreadIntervalSeconds = "120" > 
-		<persistence strategy="localTempSwap"/>
-	</cache>
-
-</ehcache>
\ No newline at end of file
diff --git a/src/test/resources/krill.properties b/src/test/resources/krill.properties
index a6302b6..ea60670 100644
--- a/src/test/resources/krill.properties
+++ b/src/test/resources/krill.properties
@@ -1,4 +1,5 @@
 krill.version = ${project.version}
 krill.name = ${project.name}
 krill.indexDir = test-output
-krill.namedVC = vc
\ No newline at end of file
+krill.namedVC = vc
+krill.index.commit.count = 15
\ No newline at end of file