Make defaultSearchContextLength and maxCharContextSize customizable.

Change-Id: I24a35e0ffa0b7904e3e8df38d87015bcb831d43e
diff --git a/src/test/resources/krill.properties b/src/test/resources/krill.properties
index fc26a13..5afab41 100644
--- a/src/test/resources/krill.properties
+++ b/src/test/resources/krill.properties
@@ -9,3 +9,4 @@
 krill.match.expansion.includeContextSize = true
 krill.match.max.token=50
 krill.context.max.token=25
+krill.search.context.default=6
\ No newline at end of file