Remove unused osd_test.cpp and mock/ringloop.h, move epmgr out of osd_t

src/client/cluster_client.h

@@ -155,9 +155,6 @@ public:
     void list_inode(inode_t inode, uint64_t min_offset, uint64_t max_offset, int max_parallel_pgs, std::function<void(
         int status, int pgs_left, pg_num_t pg_num, std::set<object_id>&& objects)> pg_callback);
 
-    //inline uint32_t get_bs_bitmap_granularity() { return st_cli.global_bitmap_granularity; }
-    //inline uint64_t get_bs_block_size() { return st_cli.global_block_size; }
-
 #ifndef __MOCK__
 protected:
 #endif

src/client/messenger.h

@@ -179,7 +179,7 @@ protected:
 
 public:
     timerfd_manager_t *tfd = NULL;
-    ring_loop_t *ringloop = NULL;
+    ring_loop_i *ringloop = NULL;
     bool has_sendmsg_zc = false;
     // osd_num_t is only for logging and asserts
     uint64_t next_client_id = 1;