raft: rename progress.hh to tracker.hh

class tracker is the main class of this module.

configure.py

@@ -545,7 +545,7 @@ scylla_raft_core = [
     'raft/raft.cc',
     'raft/server.cc',
     'raft/fsm.cc',
-    'raft/progress.cc',
+    'raft/tracker.cc',
     'raft/log.cc',
 ]
 

raft/fsm.hh

@@ -22,7 +22,7 @@
 
 #include <seastar/core/condition-variable.hh>
 #include "raft.hh"
-#include "progress.hh"
+#include "tracker.hh"
 #include "log.hh"
 
 namespace raft {

raft/tracker.cc

@@ -18,7 +18,7 @@
  * You should have received a copy of the GNU General Public License
  * along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
  */
-#include "progress.hh"
+#include "tracker.hh"
 #include <seastar/core/coroutine.hh>
 #include <seastar/core/on_internal_error.hh>