ceph-volume: exceptions: create a module for all exceptions

Signed-off-by: Alfredo Deza <adeza@redhat.com>

src/ceph-volume/ceph_volume/exceptions.py

@@ -0,0 +1,16 @@
+
+
+class SuffixParsingError(Exception):
+
+    def __init__(self, suffix, part=None):
+        self.suffix = suffix
+        self.part = part
+
+    def __str__(self):
+        return 'Unable to parse the %s from systemd suffix: %s' % (self.part, self.suffix)
+
+
+class SuperUserError(Exception):
+
+    def __str__(self):
+        return 'This command needs to be executed with sudo or as root'