class/lib: Fix up various file access methods

There are various bits of cruft that have built up around our file accesses. This patch
cleans some of them up, specifically:

 * Remove pointless "from __builtin__ import file"
 * Use open(), not file()
 * Wrap file usage in a with container to ensure files are closed
 * Add missing .close() calls in some cases

(From OE-Core rev: a43e0a8ecd0441131e929daf998c3cd454d9c8f3)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/classes/imagetest-qemu.bbclass b/meta/classes/imagetest-qemu.bbclass
index 63ba08718e..c30d1cbc85 100644
--- a/meta/classes/imagetest-qemu.bbclass
+++ b/meta/classes/imagetest-qemu.bbclass
@@ -146,6 +146,7 @@ def qemuimagetest_main(d):
                        if not os.path.isfile(fulltestcase):
                             raise bb.build.FuncFailed("Testcase %s not found" % fulltestcase)
                        list.append((item, casefile, fulltestcase))
+                    f.close()
         final_list = check_list(list)
         return final_list