develop_integration_w15 into develop

Summary of changes:
- DCI1 20MHz phy-test bug fix
- RLC UM/AM max header size fix
- UE autotests improvements

See merge request !177

- RBs set to 25
- disable SRS

In 20MHz the UE didn't do any uplink granted by DCI0.
It was replying to RAR, so uplink decoding was okay.

Turns out the DCI0 structure for TDD was wrong.

Merge remote-tracking branch 'origin/bugfix-234-rlc-um-max-header-size' into develop_integration_w15

Fabrice Nabet (TCL) suggests the value 128 for both.
See https://gitlab.eurecom.fr/oai/openairinterface5g/issues/234#note_3179

The constant RLC_UM_SEGMENT_NB_MAX_LI_PER_PDU is set to 24. This is
too low. Running a downlink TCP iperf with a 10MHz or 20MHz cell
leads to lots of the following warning in the log:

[RLC][W][SN 792] Bad RLC header! Discard this RLC PDU (size=618)

The problem is that the uplink RLC PDU contains a lot of TCP ack.
We can see much more than 24 of them. The RLC layer is not happy
and discards the PDU.

Putting 256 for RLC_UM_SEGMENT_NB_MAX_LI_PER_PDU (arbitrarily chosen,
big but not too big) solves the problem, at least for 10MHz.

it was:

    *num_li_pP >= RLC_UM_SEGMENT_NB_MAX_LI_PER_PDU

it should be:

    *num_li_pP > RLC_UM_SEGMENT_NB_MAX_LI_PER_PDU

develop_integration_w14 into develop

Summary of changes:
- minor bug fixes, minor improvements

See merge request !173

Using "system" to call "git log" is too error-prone.
In the test setup, lte-softmodem was blocked because
"git log" uses a pager ("less") and the pager was
waiting for the user to press enter.

We could pass "--no-pager" to "git log" but then
what if someone runs the softmodem out of the source
tree?

cmake defines PACKAGE_VERSION, we can use that instead,
as is done in openair-cn.