Fix few tests

system/t03_help/MirrorCreateHelpTest_gold

@@ -10,7 +10,7 @@ PPA urls could specified in short format:
 
 Example:
 
-  $ aptly mirror create wheezy-main http://cdn-fastly.deb.debian.org/debian/ wheezy main
+  $ aptly mirror create wheezy-main http://mirror.yandex.ru/debian/ wheezy main
 
 Options:
   -architectures="": list of architectures to consider during (comma-separated), default to all available
@@ -31,3 +31,4 @@ Options:
   -with-installer: download additional not packaged installer files
   -with-sources: download source packages in addition to binary packages
   -with-udebs: download .udeb packages (Debian installer support)
+

system/t04_mirror/CreateMirror30Test_gold

@@ -1,8 +1,11 @@
-opengpg: failure opening keyring '/home/smira/.gnupg/aptlytest.gpg': open /home/smira/.gnupg/aptlytest.gpg: no such file or directory
+opengpg: failure opening keyring '${HOME}/.gnupg/aptlytest.gpg': open ${HOME}/.gnupg/aptlytest.gpg: no such file or directory
 
 Looks like your keyring with trusted keys is empty. You might consider importing some keys.
-Downloading http://ftp.us.debian.org/debian-backports/dists/squeeze-backports/InRelease...
-openpgp:  RSA key ID 8B48AD6246925553
+Downloading http://cdn-fastly.deb.debian.org/debian/dists/stretch/InRelease...
+Downloading http://cdn-fastly.deb.debian.org/debian/dists/stretch/Release...
+Downloading http://cdn-fastly.deb.debian.org/debian/dists/stretch/Release.gpg...
+openpgp:  RSA key ID 7638D0442B90D010
 openpgp: Can't check signature: public key not found
-Downloading http://ftp.us.debian.org/debian-backports/dists/squeeze-backports/Release...
-ERROR: unable to fetch mirror: HTTP code 404 while fetching http://ftp.us.debian.org/debian-backports/dists/squeeze-backports/Release
+openpgp:  RSA key ID 04EE7237B7D453EC
+openpgp: Can't check signature: public key not found
+ERROR: unable to fetch mirror: failed to verify detached signature: openpgp: signature made by unknown entity

system/t04_mirror/create.py

@@ -385,7 +385,7 @@ class CreateMirror30Test(BaseTest):
     """
     create mirror: repo with InRelease verification, failure  (internal GPG implementation)
     """
-    runCmd = "aptly mirror create --keyring=aptlytest.gpg mirror10 http://ftp.us.debian.org/debian-backports/ squeeze-backports"
+    runCmd = "aptly mirror create --keyring=aptlytest.gpg mirror10 http://cdn-fastly.deb.debian.org/debian/ stretch"
     configOverride = {"gpgProvider": "internal"}
     gold_processor = BaseTest.expand_environ
     fixtureGpg = False