Bump 4.3.x Couchbase Java SDK to 3.2.6. (#1411)

Also put quotes around bucket name in CollectionAwareIntegrationTests setup.

Closes #1409.

pom.xml

@@ -18,8 +18,8 @@
     </parent>
 
     <properties>
-        <couchbase>3.2.5</couchbase>
-        <couchbase.osgi>3.2.5</couchbase.osgi>
+        <couchbase>3.2.6</couchbase>
+        <couchbase.osgi>3.2.6</couchbase.osgi>
         <springdata.commons>2.6.5-SNAPSHOT</springdata.commons>
         <java-module-name>spring.data.couchbase</java-module-name>
     </properties>

src/test/java/org/springframework/data/couchbase/util/CollectionAwareIntegrationTests.java

@@ -77,7 +77,7 @@ public class CollectionAwareIntegrationTests extends JavaIntegrationTests {
 
 			List<String> fieldList = new ArrayList<>();
 			fieldList.add("parentId");
-			cluster.query("CREATE INDEX `parent_idx` ON default:" + bucketName() + "." + scopeName + "." + collectionName2
+			cluster.query("CREATE INDEX `parent_idx` ON default:`" + bucketName() + "`." + scopeName + "." + collectionName2
 					+ "(parentId)");
 		} catch (IndexExistsException ife) {
 			LOGGER.warn("IndexFailureException occurred - ignoring: ", ife.toString());