Inline objects (#3756)

* added store_client_ to object_manager and node_manager

* half through...

* all code in, and compiling! Nothing tested though...

* something is working ;-)

* added a few more comments

* now, add only one entry to the in GCS for inlined objects

* more comments

* remove a spurious todo

* some comment updates

* add test

* added support for meta data for inline objects

* avoid some copies

* Initialize plasma client in tests

* Better comments. Enable configuring nline_object_max_size_bytes.

* Update src/ray/object_manager/object_manager.cc

Co-Authored-By: istoica <istoica@cs.berkeley.edu>

* Update src/ray/raylet/node_manager.cc

Co-Authored-By: istoica <istoica@cs.berkeley.edu>

* Update src/ray/raylet/node_manager.cc

Co-Authored-By: istoica <istoica@cs.berkeley.edu>

* fiexed comments

* fixed various typos in comments

* updated comments in object_manager.h and object_manager.cc

* addressed all comments...hopefully ;-)

* Only add eviction entries for objects that are not inlined

* fixed a bunch of comments

* Fix test

* Fix object transfer dump test

* lint

* Comments

* Fix test?

* Fix test?

* lint

* fix build

* Fix build

* lint

* Use const ref

* Fixes, don't let object manager hang

* Increase object transfer retry time for travis?

* Fix test

* Fix test?

* Add internal config to java, fix PlasmaFreeTest

java/runtime/src/main/resources/ray.default.conf

@@ -85,6 +85,10 @@ ray {
   raylet {
     // RPC socket name of Raylet
     socket-name: /tmp/ray/sockets/raylet
+
+    // See src/ray/ray_config_def.h for options.
+    config {
+    }
   }
 
 }