Fix for ASTERIXDB-1886: Filter not selective

The filter was not being reset in the memory component.

Change-Id: I123438c7fe5fba64aff4e88b1bda0e2be1a32574
Reviewed-on: https://asterix-gerrit.ics.uci.edu/1691
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
BAD: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: abdullah alamoudi <bamousaa@gmail.com>
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/AbstractLSMMemoryComponent.java b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/AbstractLSMMemoryComponent.java
index bfe7fc0..7cbe35f 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/AbstractLSMMemoryComponent.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/AbstractLSMMemoryComponent.java
@@ -196,6 +196,9 @@
     public void reset() throws HyracksDataException {
         isModified.set(false);
         metadata.reset();
+        if (filter != null) {
+            filter.reset();
+        }
     }
 
     @Override