ProjectRepairer: Use rsync --progress instead of -P

'-P' is '--partial --progress'. When a transfer is aborted, '--partial'
renames the temporary file rsync was streaming into onto the final
destination name, leaving a truncated file where a complete one is
expected.

Keep '--progress' for the transfer output and let rsync discard its
temporary file on failure.

Change-Id: Icb4c37c5dfc950e1472447597a9cfade3bd97765

src/main/java/com/googlesource/gerrit/plugins/replication/ProjectRepairer.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/ProjectRepairer.java b/src/main/java/com/googlesource/gerrit/plugins/replication/ProjectRepairer.java
index 5866569..669a374 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/ProjectRepairer.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/ProjectRepairer.java
@@ -96,7 +96,8 @@
       throws InterruptedException {
     List<String> cmd = new ArrayList<>();
     cmd.add(replicationConfig.getRsyncPath());
-    cmd.add("-avP");
+    cmd.add("-av");
+    cmd.add("--progress");
     cmd.add("-e");
     cmd.add(buildSshTransport(uri));
     for (String inc : includes) {