Fix typo of setUpClass

There are a few same pattern of typo related to setUpClass.
Let's fix them.

Change-Id: Ic835bb37353f1ef6623d55f294c09f4f06a4be44
diff --git a/doc/source/test-removal.rst b/doc/source/test-removal.rst
index 4757dc4..d06e4ba 100644
--- a/doc/source/test-removal.rst
+++ b/doc/source/test-removal.rst
@@ -64,7 +64,7 @@
 
 SELECT * from tests where test_id like "%test_id%";
 (where $test_id is the full test_id, but truncated to the class because of
-setupClass or tearDownClass failures)
+setUpClass or tearDownClass failures)
 
 You can access the infra mysql subunit2sql db w/ read-only permissions with:
 
@@ -82,7 +82,7 @@
  #. run the query: MySQL [subunit2sql]> select * from tests where test_id like
     "tempest.api.compute.admin.test_flavors_negative.FlavorsAdminNegativeTestJSON%";
     which will return a table of all the tests in the class (but it will also
-    catch failures in setupClass and tearDownClass)
+    catch failures in setUpClass and tearDownClass)
  #. paste the output table with numbers and the mysql command you ran to
     generate it into the etherpad.
 
@@ -185,4 +185,4 @@
 If a test exists in Tempest that would meet this criteria as consequence of a
 change, the test must be removed according to the procedure discussed into
 this document. The API change should not be merged until all conditions
-required for test removal can be met.
\ No newline at end of file
+required for test removal can be met.