Fixed some broken test code

c4doc_getRevisionHistory requires doc be loaded with kDocGetAll.
VectorDoc correctly threw an exception on this.
Also, all this is doing is checking the current rev, so no need to
get the history.

Replicator/tests/ReplicatorCollectionTest.cc

@@ -579,8 +579,7 @@ TEST_CASE_METHOD(ReplicatorCollectionTest, "Multiple Collections Incremental Rev
     for ( const auto& coll_doc : docsWithIncrementalRevisions ) {
         c4::ref<C4Document> doc = c4coll_getDoc(coll_doc.first, coll_doc.second, true, kDocGetMetadata, ERROR_INFO());
         CHECK(doc);
-        alloc_slice hist = c4doc_getRevisionHistory(doc, 1, nullptr, 0);
-        if ( isRevTrees() ) CHECK(3 == c4rev_getGeneration(hist));
+        if ( doc && isRevTrees() ) CHECK(c4rev_getGeneration(doc->revID) == 3);
     }
 }