Fixup function hash_file

Correct the parameter name.
Signed-off-by: NXu Han <xuhan@redhat.com>

generic/tests/ethtool.py

@@ -100,7 +100,7 @@ def run(test, params, env):
     def compare_md5sum(name):
         txt = "Comparing md5sum of the files on guest and host"
         error_context.context(txt, logging.info)
-        host_result = crypto.hash_file(name, method="md5")
+        host_result = crypto.hash_file(name, algorithm="md5")
         try:
             o = session.cmd_output("md5sum %s" % name)
             guest_result = re.findall(r"\w+", o)[0]

generic/tests/nicdriver_unload.py

@@ -94,7 +94,7 @@ def run(test, params, env):
                               utils_misc.generate_random_string(8))
     cmd = "dd if=/dev/zero of=%s bs=1M count=%d" % (host_path, filesize)
     process.run(cmd)
-    file_checksum = crypto.hash_file(host_path, "md5")
+    file_checksum = crypto.hash_file(host_path, algorithm="md5")
 
     error_context.context("Guest test file prepare, Copy file %s from host to "
                           "guest" % host_path, logging.info)

qemu/tests/live_snapshot_base.py

@@ -45,7 +45,7 @@ def run(test, params, env):
                               logging.info)
         cmd = params.get("dd_cmd") % src
         process.system(cmd, timeout=dd_timeout, shell=True)
-        md5 = crypto.hash_file(src, method="md5")
+        md5 = crypto.hash_file(src, algorithm="md5")
         vm.copy_files_to(src, dst, timeout=copy_timeout)
         process.system("rm -f %s" % src)
         error_context.context("create live snapshot", logging.info)
@@ -60,7 +60,7 @@ def run(test, params, env):
         error_context.context("copy file to host, check content not changed",
                               logging.info)
         vm.copy_files_from(dst, src, timeout=copy_timeout)
-        if md5 and (md5 != crypto.hash_file(src, method="md5")):
+        if md5 and (md5 != crypto.hash_file(src, algorithm="md5")):
             test.fail("diff md5 before/after create snapshot")
         session.cmd(params.get("alive_check_cmd", "dir"))
     finally: