Different Time range on GC activity and CPU load graphs

[tjanasiewicz]

Describe the bug
Different Time range on GC activity and CPU load graphs

To Reproduce
Steps to reproduce the behavior:
Unknown

Expected behavior
The same time range should be shown on both graphs

Screenshots
If applicable, add screenshots to help explain your problem.

And example:

[tjanasiewicz]

There is a chance that this issue is observed when the input data are invalid, but still, the range should be the same, and should consider the first and last javacores collection time.

@PiotrAniola82 any comments?

[PiotrAniola82]

CPU chart looks correct.
GC chart should not be displayed if there is no verboseGC data.
If there are no verbose GC logs in the input, there should be a message: "No verbosegc logs"
If there are verbose GC logs, but no collections in the javacore time limits, there should be a message "No GC activity was detected within the javacore time limits"