Replace `fake-factory` with `Faker`; bump its ver.

This is the same package, it was submitted to PyPI under a new name.

@@ -70,7 +70,7 @@ robot_tests.broker.uub          = git ${remotes:gh}openprocurement/robot_tests.b
 robot_tests.broker.aps          = git ${remotes:gh}openprocurement/robot_tests.broker.aps.git
 
 [versions]
-fake-factory = 0.5.3
+Faker = 0.7.7
 mr.developer = 1.34
 restkit = 4.2.2.op1
 rfc6266 = 0.0.6.op1

@@ -27,7 +27,7 @@ setup(name='op_robot_tests',
           'iso8601',
           'PyYAML',
           'munch',
-          'fake-factory',
+          'Faker',
           'dpath',
           'jsonpath-rw',
           'dateutils',