OPENNLP-1022: Fix documentation to remove references to 'Save XXXMode…

[smarthi]

…l to database'

Thank you for contributing to Apache OpenNLP.

In order to streamline the review of the contribution we ask you
to ensure the following steps have been taken:

For all changes:

• Is there a JIRA ticket associated with this PR? Is it referenced
  in the commit message?

• Does your PR title start with OPENNLP-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.

• Has your PR been rebased against the latest commit within the target branch (typically master)?

• Is your initial contribution a single, squashed commit?

For code changes:

• Have you ensured that the full suite of tests is executed via mvn clean install at the root opennlp folder?
• Have you written or updated unit tests to verify your changes?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE file, including the main LICENSE file in opennlp folder?
• If applicable, have you updated the NOTICE file, including the main NOTICE file found in opennlp folder?

For documentation related changes:

• Have you ensured that format looks appropriate for the output in which it is rendered?

Note:

Please ensure that once the PR is submitted, you check travis-ci for build issues and submit an update to your PR as soon as possible.

[coveralls]

Coverage remained the same at 55.883% when pulling d2a6667 on smarthi:OPENNLP-1022 into b188b5c on apache:master.

[wcolen]

+1 lgtm

[kottmann]

+1 lgtm

[coveralls]

Coverage increased (+0.007%) to 55.89% when pulling 6bdb480 on smarthi:OPENNLP-1022 into 4efd950 on apache:master.

[coveralls]

Coverage increased (+0.007%) to 55.975% when pulling c13339f on smarthi:OPENNLP-1022 into e76ba36 on apache:master.

[coveralls]

Coverage increased (+0.007%) to 56.243% when pulling 8b493e4 on smarthi:OPENNLP-1022 into 2721401 on apache:master.

[wcolen]

+1 LGTM