Move RcuVector and relevant support classes to vespalib

Having RCU support available across all our C++ modules open up
new opportunities for optimizations.

This changes the following:
- `RcuVector` moved from `searchlib` to `vespalib`
- `MemoryUsage` moved from `searchlib` to `vespalib`
- Introduce a simplified, more generic `GrowStrategy` in `vespalib`
  used by the moved `RcuVector` which does not have any notion of
  documents. Existing searchlib `GrowStrategy` gets a simple function
  to convert to this generic strategy.

2 files changed, 3 insertions, 3 deletions

diff --git a/searchcore/src/tests/proton/documentdb/configurer/configurer_test.cpp b/searchcore/src/tests/proton/documentdb/configurer/configurer_test.cpp
index 5172489ced1..aba879e5a44 100644
--- a/searchcore/src/tests/proton/documentdb/configurer/configurer_test.cpp
+++ b/searchcore/src/tests/proton/documentdb/configurer/configurer_test.cpp
@@ -197,7 +197,7 @@ Fixture::initViewSet(ViewSet &views)
     auto attrMgr = make_shared<AttributeManager>(BASE_DIR, "test.subdb", TuneFileAttributes(), views._fileHeaderContext,
                                                  views._writeService.attributeFieldWriter(),views._hwInfo);
     auto summaryMgr = make_shared<SummaryManager>
-            (_summaryExecutor, search::LogDocumentStore::Config(), GrowStrategy(), BASE_DIR, views._docTypeName,
+            (_summaryExecutor, search::LogDocumentStore::Config(), search::GrowStrategy(), BASE_DIR, views._docTypeName,
              TuneFileSummary(), views._fileHeaderContext,views._noTlSyncer, search::IBucketizer::SP());
     auto sesMgr = make_shared<SessionManager>(100);
     auto metaStore = make_shared<DocumentMetaStoreContext>(make_shared<BucketDBOwner>());
diff --git a/searchcore/src/tests/proton/documentdb/document_subdbs/document_subdbs_test.cpp b/searchcore/src/tests/proton/documentdb/document_subdbs/document_subdbs_test.cpp
index a80497636e6..68c388111d3 100644
--- a/searchcore/src/tests/proton/documentdb/document_subdbs/document_subdbs_test.cpp
+++ b/searchcore/src/tests/proton/documentdb/document_subdbs/document_subdbs_test.cpp
@@ -128,8 +128,8 @@ struct MyStoreOnlyConfig
         : _cfg(DocTypeName(DOCTYPE_NAME),
               SUB_NAME,
               BASE_DIR,
-              GrowStrategy(),
-                   0, 0, SubDbType::READY)
+              search::GrowStrategy(),
+              0, 0, SubDbType::READY)
     {
     }
 };