Bump flask to past 1.0 (current 1.0.2)

Flask has move to 1.0 and is quite stable. New in 1.0+ is a lot
of beneficial test bits among other generally nice changes. In
moving Keystone to Flask, we would like to lean on the new test
capabilities in 1.0+

Change-Id: Ie0e8984c4c02a426eb1e7cbac8c5117aaaff5c40

global-requirements.txt

@@ -58,7 +58,7 @@ eventlet!=0.18.3,!=0.20.1,!=0.21.0,!=0.23.0  # MIT
 exabgp  # BSD
 extras  # MIT
 falcon  # Apache-2.0
-Flask!=0.11,<1.0  # BSD
+Flask!=0.11  # BSD
 flask-keystone  # Apache-2.0
 flask-oslolog  # Apache-2.0
 Flask-RESTful  # BSD

lower-constraints.txt

@@ -455,7 +455,7 @@ watchdog===0.8.3
 gevent===1.2.2
 os-vif===1.7.0
 python-masakariclient===3.0.1
-Werkzeug===0.9
+Werkzeug===0.14
 pyasn1-modules===0.0.6
 APScheduler===3.4.0
 pip===8.0.3
@@ -505,7 +505,7 @@ greenlet===0.4.10
 xvfbwrapper===0.1.3
 futures===3.0.0
 tosca-parser===1.0.0
-Flask===0.10
+Flask===1.0.2
 pymod2pkg===0.7.0
 happybase===0.5
 marathon===0.8.6

upper-constraints.txt

@@ -509,7 +509,7 @@ XStatic-Angular-Vis===4.16.0.0
 xvfbwrapper===0.2.9
 futures===3.2.0;python_version=='2.7'
 tosca-parser===1.0.0
-Flask===0.12.4
+Flask===1.0.2
 happybase===1.1.0;python_version=='2.7'
 marathon===0.9.3
 fasteners===0.14.1