Fixed misspellings of common words

Fixed misspelling of common words found by the 'misspellings' tool.

Closes-Bug: #1257531
Change-Id: Ic6bedbce3a242d6e1340ecc442d29605af8be9a4
Ignore fewer PEP8/flake8 rules

Reasons:
- code should be pythonicaly clean,
  that is why number of ignored rules should reduced

Changes:
- E125, F811, H102, H103, F201, H23,
  H302, F841, H301, H702, H703 rules are now enabled

Change-Id: Ibf4025162244d3c2f1278b49a76ec1527a729042
Updated from global requirements

Change-Id: Ibca24abb665e28ebcb2010d036467c3cec7c7541
Changes trove_client.client.HTTPClient to
trove_client.HTTPClient

Reasons:
 - trove shell is not working.
 - troveclient.client is now imported as trove_client
   but while calling the method it has been called
   as trove_client.client

Changes:
- Changes trove_client.client.HTTPClient to
  trove_client.HTTPClient in troveclient/v1/client.py

Change-Id: I12b0a0d9792f69ad04a17c36a8de134f233afc85
Closes-Bug: #1259882
Add -U to pip install command in tox.ini

Ask pip to upgrade packages in the virtualenv so that a long-lived
virtualenv is still kept up to date as external dependencies change.

Change-Id: Id1e83aa5dd7c39d4827baeb39827b0ddeb8b6d4a
Fixes trove help command

Reason:
- trove help output misplaces the position of "<subcommand> ..."
  from bottom to top.
- This behavior is because of formatting done to
  Print positionals before optionals.

Changes:
- Sequence fixed in trove help output.

Change-Id: I8aff2eec9f915a7ec1960b67ee7ba8423624aad6
Closes-Bug: #1260332
Merge "Add -U to pip install command in tox.ini"
Merge "Updated from global requirements"
Merge "Fixed misspellings of common words"
Merge "Fixes trove help command"