Remove duplicate text from Cinder Troubleshooting

Both section_ts_cinder_config.xml and
section_block_storage_troubleshooting.xml contained the same initial
paragraphs but differences in the rest.

The extra table and text from section_block_storage_troubleshooting.xml has been
moved to section_ts_cinder_config.xml.

section_block_storage_troubleshooting.xml is now obsolete.

Also, fix some typos.

Change-Id: Ife61dbc2bcb9f3a6fa78a8147fee6cfb2e3dfb7f
Merge "Remove duplicate text from Cinder Troubleshooting"