issue NXP-13252: improve oracle connection closed detection (fixing infinite recursive loop regression)
https://jira.nuxeo.com/browse/NXP-13252
Revert "issue NXP-13252: improve oracle connection closed detection (fixing infinite recursive loop regression)"

This reverts commit 157e8d29958970a43c4842cca585309874fa23dc.
Revert "NXP-13252: improve oracle connection closed detection (fix test case)"

This reverts commit 982fc1ad7dfa75e249a0e7a1fd707160acd4d0ed.
Revert "NXP-13252: improve oracle connection closed detection"

This reverts commit 150faade46a9591588b228dc21d688d1232e8c2a.
NXP-13285: remove unused Net VCS code