Clean up requirements

Paramiko used to be required by ironic, now it's only used by ansible
and should be handled by its requirements.

Simplify the setuptools requirement to use the version from
Bionic as a minimum and pull in the latest exclusions from g-r.

Move PyYAML to requirements since it's used in production code.

Remove test requirements that are not referenced anywhere.

Change-Id: Idc9f1cd66b123c9c9325d7fd7a557475bfdbdd68

lower-constraints.txt

@@ -31,8 +31,6 @@ oslo.i18n==3.20.0
 oslo.log==3.36.0
 oslo.serialization==2.25.0
 oslo.utils==3.36.0
-oslotest==3.2.0
-paramiko==2.0.0
 pbr==2.0.0
 prettytable==0.7.2
 pyasn1==0.4.2
@@ -51,11 +49,9 @@ requests==2.18.4
 requestsexceptions==1.4.0
 restructuredtext-lint==1.1.3
 rfc3986==1.1.0
-setuptools==21.0.0
+setuptools==39.0.1
 stestr==2.0.0
 stevedore==1.28.0
-testrepository==0.0.18
-testscenarios==0.4
 testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0

requirements.txt

@@ -4,6 +4,8 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
-paramiko>=2.0.0 # LGPLv2.1+
+PyYAML>=3.12 # MIT
+# TODO(dtantsur): remove pyOpenSSL when we no longer support Bionic and
+# openSUSE updates its version to at least 18.0.0.
 pyOpenSSL>=18.0.0 # Apache-2.0
-setuptools!=24.0.0,!=34.0.0,!=34.0.1,!=34.0.2,!=34.0.3,!=34.1.0,!=34.1.1,!=34.2.0,!=34.3.0,!=34.3.1,!=34.3.2,!=36.2.0,>=21.0.0 # PSF/ZPL
+setuptools!=48.0.0,!=49.0.0,>=39.0.1 # PSF/ZPL

test-requirements.txt

@@ -6,12 +6,8 @@ hacking>=3.0,<4.0.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
-oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
-testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-PyYAML>=3.12 # MIT
 Pygments>=2.2.0 # BSD license
 flake8-import-order>=0.17.1 # LGPLv3