Raise jsonschema requirement

Glance PATCH API need use new 'require' condition for schema to validate
income requests.

Raise jsonschema requirement to >=1.3.0,!=1.4.0.

See bug #1202391 for details.

Change-Id: I3b8054b25f2b3d9ed0c3dd1be320f7402ceb9635
Signed-off-by: Zhi Yan Liu <zhiyanl@cn.ibm.com>