fix: subscribeEvents issue for non-prologue partitions

Scribe was setting subscribeEvents as false even when it never
makes a follow-up narrateEventLog call.

Author: iridiankin

packages/prophet/Oracle/OraclePartitionConnection.js

@@ -43,8 +43,7 @@ export default class OraclePartitionConnection extends PartitionConnection {
     this.setUpstreamConnection(this._authorityProphet.acquirePartitionConnection(
         this.getPartitionURI(), {
           narrateOptions: false,
-          subscribeEvents:
-              (options.narrateOptions === false) && (options.subscribeEvents !== false),
+          subscribeEvents: (options.narrateOptions === false) && options.subscribeEvents,
           receiveTruths: this.getReceiveTruths(options.receiveTruths),
         }));
     return thenChainEagerly(

packages/prophet/Scribe/ScribePartitionConnection.js

@@ -74,7 +74,8 @@ export default class ScribePartitionConnection extends PartitionConnection {
             // the initial optimistic narrateEventLog later below using
             // options.receiveTruths.
             ...options,
-            receiveTruths: this.getReceiveTruths(), narrateOptions: false, subscribeEvents: false,
+            receiveTruths: this.getReceiveTruths(), narrateOptions: false,
+            subscribeEvents: (options.narrateOptions === false) && options.subscribeEvents,
           }));
     }
     // ScribePartitionConnection can be active even if the upstream