config+lsdb: Retry retrieve each LSA for `lsa-refresh-time`

This commit also includes extension of the config file
(`lsa-interest-lifetime` parameter in general section)

Change-Id: Ifd01af8cc98d41f7bdc953799a280e4b4269a358
Refs: #1873, #1874
diff --git a/tests/test-adjacent.cpp b/tests/test-adjacent.cpp
index 0dc7af0..d7eef1b 100644
--- a/tests/test-adjacent.cpp
+++ b/tests/test-adjacent.cpp
@@ -40,8 +40,8 @@
   Adjacent adjacent2(ADJ_NAME_2);
   BOOST_CHECK(adjacent1 == adjacent2);
 
-  adjacent1.setLinkCost(10.5);
-  BOOST_CHECK_CLOSE(adjacent1.getLinkCost(), 10.5, 0.0001);
+  adjacent1.setLinkCost(10.1);
+  BOOST_CHECK_EQUAL(adjacent1.getLinkCost(), 11);
 
   BOOST_CHECK_EQUAL(adjacent1.getName(), "testname");