Asciidoc throw warnings while building documentation

During the documentation build phase, the following errors are observed:

Branch: 1.3

asciidoctor: WARNING: content-based-routing.adoc: line 76: invalid style for listing block: TIP
asciidoctor: WARNING: filtering.adoc: line 76: invalid style for listing block: TIP

The above errors occur on branch 1.3
The error indicates that the usage of TIP is incorrect. What was observed is that these files define the TIP sections as

[TIP]
----
text
----

but should be formatted as

[TIP]
====
text
====

This requires that branch 1.3 be fast-forwarded (which will happen during the next release cycle) and this fix will be there.

In addition to these, the following are observed on the 1.1 branch only.

asciidoctor: WARNING: oracle.adoc: line 993: unterminated table block
asciidoctor: WARNING: oracle.adoc: line 1049: section title out of sequence: expected level 1, got level 3
asciidoctor: WARNING: oracle.adoc: line 1093: section title out of sequence: expected level 1, got level 2
asciidoctor: WARNING: skipping reference to missing attribute: link-java7-standard-names

Ideally it would be helpful to push some small fixes to each branch respectively to correct the build warnings for that branch so we keep the build clean of warnings/errors.