part of fix for HER-1627 incorrect source tag in crawl.log (of persist-loaded crawl)

* EnhancedEnvironment.java
    in getClassCatalog(), when read-only env, insist on read-only catalog
* PersistLoadProcessor.java
    remove existing curi members from prior to prevent clobbering source
* PersistProcessor.java
    set historyDbConfig read-only, set je.log.faultReadSize for
        compatability with BDBModule.setup()

commons/src/main/java/org/archive/util/bdbje/EnhancedEnvironment.java

@@ -59,6 +59,7 @@ public class EnhancedEnvironment extends Environment {
         if(classCatalog == null) {
             DatabaseConfig dbConfig = new DatabaseConfig();
             dbConfig.setAllowCreate(true);
+            dbConfig.setReadOnly(this.getConfig().getReadOnly());
             try {
                 classCatalogDB = openDatabase(null, "classCatalog", dbConfig);
                 classCatalog = new StoredClassCatalog(classCatalogDB);