Adding next first key repair to the ExternalPagedStore. This functionality is disabled by default.
It can be enabled with -Deps.fix.nextfirstkey=true. If enabled if will set the nextFirstKey on a page
to the correct value during page deletion when an incorrect value of nextFirstKey is detected.
Merge pull request #8 from mspiegel/master

Adding next first key repair to the ExternalPagedStore. This functionali...