Incorrect counter for pilot reports in the activity log

[Nicklas Nordborg]

Created 16777214 pilot reports

This is clearly not correct. The entry before it:

Legacy pipeline auto-confirmed for 23 libraries

So the correct number of pilot reports should be 23.

[Nicklas Nordborg]

Trying this out by creating pilot reports one by one reveals that the counter is increasing as: 2, 6, 14, 30, 62, ... which seems to have a pattern of next=(current+1)*2. Or we can find out the value for N pilot reports by 2^(N+1) - 2). With N=23 we get 16777214.

[Nicklas Nordborg]

In 5614:

Fixes #1181: Incorrect counter for pilot reports in the activity log

There was a problem with the "merge" action that update entries in the activity log was added twice by the report plug-in. The first entry worked as expected by adding 1 to the existing count, but when executing the same code a second time it would add the new total to itself (causing the doubling effect).

[Nicklas Nordborg]

In 5621:

References #1181: Incorrect counter for pilot reports in the activity log

Add a check to the "merge" actions so that an entry cannot be merged with itself.