minor bugs in dynnxt and icbtrj (v3.6 and trunk)

[gm]

In v3.6 stable, trunk and dev_merge_2017, two MINOR bugs :

In dynnxt.F90

context : variable volume (key_vvl in v3.6 ; ln_linssh=F in trunk), and model starts with a euler time-stepping (starting from rest or data assimilation), the swap of e3t, u and v is wrong : swap of now to before time-step instead of after to now.
Only a minor bug as it only concerns the very first Euler time-step of a model run

Fix : lines 233-235, change "_b" by "_n" and "_n" by "_a"

               e3t_b(:,:,jk) = e3t_n(:,:,jk)
               e3u_b(:,:,jk) = e3u_n(:,:,jk)
               e3v_b(:,:,jk) = e3v_n(:,:,jk)

replaced by

               e3t_n(:,:,jk) = e3t_a(:,:,jk)
               e3u_n(:,:,jk) = e3u_a(:,:,jk)
               e3v_n(:,:,jk) = e3v_a(:,:,jk)

In icbtrj.F90

context : in iceberg trajectory output files long name of two variables (ssh_x and ssh_y) has been inverted

Fix : lines 112-113, the last argument of NF90_DEF_VAR function has been inverted:

iret = NF90_DEF_VAR(ntrajid, 'ssh_x', NF90_DOUBLE, n_dim, nsshyid)
iret = NF90_DEF_VAR(ntrajid, 'ssh_y', NF90_DOUBLE, n_dim, nsshxid)

replaced by

iret = NF90_DEF_VAR(ntrajid, 'ssh_x', NF90_DOUBLE, n_dim, nsshxid)
iret = NF90_DEF_VAR(ntrajid, 'ssh_y', NF90_DOUBLE, n_dim, nsshyid)

[gm]

In 9225:

Error: Failed to load processor CommitTicketReference

No macro or processor named 'CommitTicketReference' found

[gm]

In 9226:

Error: Failed to load processor CommitTicketReference

No macro or processor named 'CommitTicketReference' found

[gm]

Fix in v3.6_STABLE —— see rev 9225

Fix in dev_merge_2017 (will be the trunk in February 2018) —— see rev 9226

==>>> ticket closed

[gm]

In 9239:

Error: Failed to load processor CommitTicketReference

No macro or processor named 'CommitTicketReference' found

[gm]

associated with dynnxt.F90 issue, there is the same minor bug un sshwzv.F90
The swap in euler 1st time-step case should be : sshn(:,:) = ssha(:,:) , i.e. now <== after (before already = now)
not sshb(:,:) = sshn(:,:) , i.e. before <== now

change made in r9239