DOC: Fix GradientDescentOptimizer doc grammar.

Change-Id: I198601713ed573a824988ed678f5d1e66fc42252
BUG: Using consistent naming for Transform template name change.

All all changed added "Template" to the end of the class name.  Classes with
v4 in the name inserted "Template" before the "v4".  "Templatev4" ->
"v4Template" for consistency.

Change-Id: I3ede4d70a623e86bce78b088a43acaeb71c7dd1e
Merge topic 'GradientDescentDoc'

c994191 DOC: Fix GradientDescentOptimizer doc grammar.
Merge topic 'Templatev4Name'

aa8f724 BUG: Using consistent naming for Transform template name change.