Fix intermittent QSPagingTest failures due to periodic pager runs

The pager is set to run every 5s by default, which messes up the test
expectations on some of the tests.

Change-Id: Ie9b4f01b8ef0ae7271fa11836d2d2e233b516bdc
Reviewed-on: https://review.couchbase.org/c/kv_engine/+/189986
Reviewed-by: James H <[email protected]>
Tested-by: Build Bot <[email protected]>

Author: veselink1

tests/testapp_cluster/quota_sharing_paging_test.cc

@@ -39,7 +39,11 @@ class QSPagingTest : public ClusterTest {
     }
 
     static void SetUpTestCase() {
-        cluster = Cluster::create(1);
+        cluster = Cluster::create(1, {}, [](auto&&, auto& config) {
+            // Don't run the item pager at a set interval, as this interferes
+            // with some of the tests which depend on ep_num_pager_runs.
+            config["quota_sharing_pager_sleep_time_ms"] = 300'000;
+        });
     }
 
     static void TearDownTestCase() {
@@ -216,6 +220,9 @@ class QSPagingTest : public ClusterTest {
             {"replicas", 0},
             {"max_vbuckets", maxVBuckets},
             {"cross_bucket_ht_quota_sharing", true},
+            // Don't run the item pager at a set rate, as that affects the
+            // tests which depend on the ep_num_pager_runs stat.
+            {"pager_sleep_time_ms", 300'000},
             // Setting the increment factor to 0 means we always increment
             {"freq_counter_increment_factor", 0},
             // Keep checkpoint memory usage minimal