storage_service: Fix is_auto_bootstrap

Get the value from cfg option.

db/config.hh

@@ -348,7 +348,7 @@ public:
     /* Advanced properties */   \
     /* Properties for advanced users or properties that are less commonly used. */  \
     /* Advanced initialization properties */    \
-    val(auto_bootstrap, bool, true, Unused,     \
+    val(auto_bootstrap, bool, true, Used,     \
             "This setting has been removed from default configuration. It makes new (non-seed) nodes automatically migrate the right data to themselves. When initializing a fresh cluster with no data, add auto_bootstrap: false.\n"  \
             "Related information: Initializing a multiple node cluster (single data center) and Initializing a multiple node cluster (multiple data centers)."  \
     )   \

service/storage_service.cc

@@ -61,9 +61,8 @@ bool is_replacing() {
     return false;
 }
 
-bool is_auto_bootstrap() {
-    // FIXME: DatabaseDescriptor.isAutoBootstrap()
-    return true;
+bool storage_service::is_auto_bootstrap() {
+    return _db.local().get_config().auto_bootstrap();
 }
 
 std::set<inet_address> get_seeds() {

service/storage_service.hh

@@ -81,6 +81,7 @@ public:
     void gossip_snitch_info();
 
 private:
+    bool is_auto_bootstrap();
     inet_address get_broadcast_address() {
         return utils::fb_utilities::get_broadcast_address();
     }