Replace is_interactive with interactive for consistency in the code.

Bug: none
Test: unittests
Change-Id: I8c98860cfeadb52c7f8e4931d2ad154ae4211d47
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index c38c0b1..133c7e6 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -376,11 +376,11 @@
   int err;
 
   int flags = O_RDWR;
-  if (!is_interactive_)
+  if (!interactive_)
     flags |= O_DSYNC;
 
   LOG(INFO) << "Opening " << target_path_ << " partition with"
-            << (is_interactive_ ? "out" : "") << " O_DSYNC";
+            << (interactive_ ? "out" : "") << " O_DSYNC";
 
   target_fd_ = OpenFile(target_path_.c_str(), flags, true, &err);
   if (!target_fd_) {