add "NoSuch" custom exceptions

Add more custom exception classes. This will allow to programmatically
determine the error causes from complex RPCs.

This commit simply defines the new classes and fault codes. Nothing in
Koji's codebase uses these exceptions yet. We'll begin to raise these
exceptions after this is widely deployed for clients in the field.

koji/exceptions.py

@@ -130,3 +130,51 @@ class LiveMediaError(GenericError):
 class GSSAPIAuthError(AuthError):
     """Raised when GSSAPI issue in authentication"""
     faultCode = 1023
+
+
+class NoSuchArchive(object):
+    faultCode = 1024
+
+
+class NoSuchBuild(object):
+    faultCode = 1025
+
+
+class NoSuchChannel(object):
+    faultCode = 1026
+
+
+class NoSuchContentGenerator(object):
+    faultCode = 1027
+
+
+class NoSuchPackage(object):
+    faultCode = 1028
+
+
+class NoSuchPermission(object):
+    faultCode = 1029
+
+
+class NoSuchRPM(object):
+    faultCode = 1030
+
+
+class NoSuchRepo(object):
+    faultCode = 1031
+
+
+class NoSuchTag(object):
+    faultCode = 1032
+
+
+class NoSuchTarget(object):
+    faultCode = 1033
+
+
+class NoSuchTask(object):
+    faultCode = 1034
+
+
+class NoSuchUser(object):
+    faultCode = 1035