Use "resolve()", not "execute()", for PhutilExecPassthru callsites in Phabricator

Summary: Ref T13660. Clean up callsites to "PhutilExecPassthru->execute()" to prepare to deprecate it.

Test Plan:
  - Grepped for "PhutilExecPassthru" and looked for callsites.
  - Ran `GIT_SSH=.../ssh-connect git ls-remote origin` to execute the "ssh-connect" code.
  - The two passthru future methods have no callers and could possibly be removed, but I'm just letting sleeping dogs lie for now.

Reviewers: cspeckmim

Reviewed By: cspeckmim

Maniphest Tasks: T13660

Differential Revision: https://secure.phabricator.com/D21703

Author: epriestley

scripts/ssh/ssh-connect.php

@@ -154,6 +154,6 @@ function ssh_connect_signal($signo) {
 array_unshift($arguments, $pattern);
 
 $err = newv('PhutilExecPassthru', $arguments)
-  ->execute();
+  ->resolve();
 
 exit($err);

src/applications/repository/storage/PhabricatorRepository.php

@@ -499,7 +499,7 @@ public function getRemoteCommandFuture($pattern /* , $arg, ... */) {
 
   public function passthruRemoteCommand($pattern /* , $arg, ... */) {
     $args = func_get_args();
-    return $this->newRemoteCommandPassthru($args)->execute();
+    return $this->newRemoteCommandPassthru($args)->resolve();
   }
 
   private function newRemoteCommandFuture(array $argv) {
@@ -540,7 +540,7 @@ public function getLocalCommandFuture($pattern /* , $arg, ... */) {
 
   public function passthruLocalCommand($pattern /* , $arg, ... */) {
     $args = func_get_args();
-    return $this->newLocalCommandPassthru($args)->execute();
+    return $this->newLocalCommandPassthru($args)->resolve();
   }
 
   private function newLocalCommandFuture(array $argv) {