full-cluster-restart tests: prevent shards from going inactive

FullClusterRestartIT.testRecovery relies on the translogs not being flushed

Author: bleskes

qa/full-cluster-restart/build.gradle

@@ -48,6 +48,10 @@ for (Version version : indexCompatVersions) {
     numBwcNodes = 2
     numNodes = 2
     clusterName = 'full-cluster-restart'
+
+    // some tests rely on the translog not being flushed
+    setting 'indices.memory.shard_inactive_time', '20m'
+
     if (version.onOrAfter('5.3.0')) {
       setting 'http.content_type.required', 'true'
     }
@@ -64,6 +68,10 @@ for (Version version : indexCompatVersions) {
         "${baseName}#oldClusterTestCluster#node1.stop"
     distribution = 'zip'
     clusterName = 'full-cluster-restart'
+
+    // some tests rely on the translog not being flushed
+    setting 'indices.memory.shard_inactive_time', '20m'
+
     numNodes = 2
     dataDir = { nodeNum -> oldClusterTest.nodes[nodeNum].dataDir }
     cleanShared = false // We want to keep snapshots made by the old cluster!