Fixed prerequisites and minimum versions

Details:

* Added PyYAML>=5.1 to requirements.txt, because it is a direct prereq of
  pywbemtools for installation.

* Added minimum versions of all indirectly referenced packages to
  minimum-constraints.txt, making sure that the requirements of their
  referencing packages are satisfied, that the Python versions needed
  by pywbemtools are supported, and that the versions are not too old
  and not too fresh.

Signed-off-by: Andreas Maier <andreas.r.maier@gmx.de>

docs/changes.rst

@@ -29,6 +29,9 @@ Released: not yet
 * Fixed that the 'class find' command showed the --namespace option twice
   (see issue #417)
 
+* Added PyYAML>=5.1 as a prerequisite package for pywbemtools for installation.
+  So far, it was pulled in indirectly via pywbem.
+
 **Enhancements:**
 
 **Cleanup:**
@@ -42,6 +45,10 @@ Released: not yet
   it fixed an issue that surfaced with pywbem minimum package levels
   on Python 3.7.
 
+* Test: Added missing indirectly referenced prerequisite packages to
+  minimum-constraints.txt, for a defined package level when testing with
+  PACKAGE_LEVEL=minimum.
+
 **Known issues:**
 
 * See `list of open issues`_.

minimum-constraints.txt

@@ -55,6 +55,7 @@ asciitree==0.3.3
 tabulate==0.8.2
 prompt-toolkit==1.0.15; python_version == '2.7'
 prompt-toolkit==2.0.1; python_version >= '3.4'
+PyYAML==5.1
 
 # Indirect dependencies for install (not in requirements.txt)
 
@@ -64,7 +65,6 @@ mock==2.0.0
 ordereddict==1.1
 pbr==1.10.0
 ply==3.10
-PyYAML==3.13
 six==1.10.0
 typing==3.6.1  # from M2Crypto
 
@@ -117,60 +117,84 @@ twine==1.8.1
 #jupyter==1.0.0
 
 # Indirect dependencies for develop (not in dev-requirements.txt)
-
 alabaster==0.7.9
 appnope==0.1.0
 args==0.1.0
+atomicwrites==1.2.1
+attrs==18.2.0
 Babel==2.3.4
+backports.functools-lru-cache==1.5; python_version < "3.3"
 bleach==2.1.4
+certifi==2019.9.11
 chardet==3.0.2
 clint==0.5.1
+configparser==4.0.2
+contextlib2==0.6.0
 coverage==4.0.3
 decorator==4.0.10
 docutils==0.13.1
 entrypoints==0.2.2
+enum34==1.1.6; python_version < "3.4"
 filelock==3.0.0
+functools32==3.2.3; python_version < "3.2"
+futures==3.3.0; python_version < "3.2"
 gitdb2==2.0.0
 html5lib==0.999999999
 idna==2.5
 imagesize==0.7.1
+importlib-metadata==0.12
 ipykernel==4.5.2
 ipython==5.1.0
 ipython_genutils==0.1.0
 ipywidgets==5.2.2
+isort==4.2.15
 Jinja2==2.8
 jsonschema==2.5.1
 jupyter_client==4.4.0
 jupyter_console==5.0.0
 jupyter_core==4.2.1
+lazy-object-proxy==1.4.2
 linecache2==1.0.0
 MarkupSafe==0.23
 mistune==0.8.1
+more-itertools==5.0.0,<6.0.0
 nbconvert==5.0.0
 nbformat==4.2.0
 notebook==4.3.1
+packaging==19.2
 pandocfilters==1.4.1
+pathlib2==2.2.1
 pexpect==4.2.1
 pickleshare==0.7.4
 pkginfo==1.4.1
+pluggy==0.12.0
 ptyprocess==0.5.1
 py==1.5.1
 Pygments==2.1.3
+pyparsing==2.3.1
 pytz==2016.10
 pyzmq==16.0.4
 qtconsole==4.2.1
+readme-renderer==21.0
 requests-toolbelt==0.7.0
+scandir==1.9.0
 sh==1.12.14
 simplegeneric==0.8.1
+singledispatch==3.4.0.3; python_version < "3.4"
 smmap2==2.0.1
 snowballstemmer==1.2.1
+sphinxcontrib-websupport==1.1.2
 terminado==0.6
 testpath==0.3
 toml==0.10.0
 tornado==4.4.2
+tqdm==4.28.1
 traceback2==1.4.0
 traitlets==4.3.1
 urllib3==1.23
 virtualenv==14.0.0
 wcwidth==0.1.7
+webencodings==0.5.1
 widgetsnbextension==1.2.6
+wrapt==1.11.2
+zipp==0.5.2

requirements.txt

@@ -21,3 +21,4 @@ tabulate>=0.8.2
 prompt-toolkit>=2.0.1; python_version >= '3.4'
 # See pywbemtools issue # 192. The repl mode fails with unexpected Exception
 prompt-toolkit>=1.0.15,<2.0.0; python_version == '2.7'
+PyYAML>=5.1