Merge ~smoser/cloud-init:fix/debian-852564-no-hardcoded-udevadm into cloud-init:master

[Scott Moser]

AltCloud: Trust PATH for udevadm and modprobe.

Previously we had hard coded paths in /sbin for the udevadm and modprobe
programs invoked by AltCloud. Its more flexible to expect the PATH to
be set correctly.

Debian: #852564

[Joshua Powers (powersj)]

LGTM

review: Approve

[Server Team CI bot (server-team-bot)]

FAILED: Continuous integration, rev:ad099a53d120e88719a5ad50f29d22e9f7a52bc7
https://jenkins.ubuntu.com/server/job/cloud-init-ci/353/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    FAILED: Ubuntu LTS: Integration

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/353/rebuild

review: Needs Fixing (continuous-integration)

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:ad099a53d120e88719a5ad50f29d22e9f7a52bc7
https://jenkins.ubuntu.com/server/job/cloud-init-ci/354/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    SUCCESS: Ubuntu LTS: Integration
    SUCCESS: MAAS Compatability Testing
    IN_PROGRESS: Declarative: Post Actions

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/354/rebuild

review: Approve (continuous-integration)

diff --git a/cloudinit/sources/DataSourceAltCloud.py b/cloudinit/sources/DataSourceAltCloud.py
index ed1d691..c78ad9e 100644
--- a/cloudinit/sources/DataSourceAltCloud.py
+++ b/cloudinit/sources/DataSourceAltCloud.py
@@ -28,8 +28,8 @@ LOG = logging.getLogger(__name__)
 CLOUD_INFO_FILE = '/etc/sysconfig/cloud-info'
 
 # Shell command lists
-CMD_PROBE_FLOPPY = ['/sbin/modprobe', 'floppy']
-CMD_UDEVADM_SETTLE = ['/sbin/udevadm', 'settle', '--timeout=5']
+CMD_PROBE_FLOPPY = ['modprobe', 'floppy']
+CMD_UDEVADM_SETTLE = ['udevadm', 'settle', '--timeout=5']
 
 META_DATA_NOT_SUPPORTED = {
     'block-device-mapping': {},
diff --git a/tests/unittests/test_datasource/test_altcloud.py b/tests/unittests/test_datasource/test_altcloud.py
index 3b274d9..a4dfb54 100644
--- a/tests/unittests/test_datasource/test_altcloud.py
+++ b/tests/unittests/test_datasource/test_altcloud.py
@@ -280,8 +280,8 @@ class TestUserDataRhevm(TestCase):
             pass
 
         dsac.CLOUD_INFO_FILE = '/etc/sysconfig/cloud-info'
-        dsac.CMD_PROBE_FLOPPY = ['/sbin/modprobe', 'floppy']
-        dsac.CMD_UDEVADM_SETTLE = ['/sbin/udevadm', 'settle',
+        dsac.CMD_PROBE_FLOPPY = ['modprobe', 'floppy']
+        dsac.CMD_UDEVADM_SETTLE = ['udevadm', 'settle',
                                    '--quiet', '--timeout=5']
 
     def test_mount_cb_fails(self):