Improve tests reproducibility to work with all three sets of packages loaded

[olexandr-konovalov]

The next task is to look which examples look differently dependently on which GAP packages are loaded. At the moment, in the GAP master branch all test pass when GAP is started with default packages, but there are two other modes - with no packages and with all packages loaded , which show harmless diffs dues to randomised algorithms. For example,

########> Diff in /circa/scratch/gap-jenkins/workspace/GAP-master-test/GAPCOPT\
S/64build/GAPTARGET/packages/label/kovacs/GAP-master-snapshot/pkg/wedderga-4.9\
.0/tst/wedderga08.tst:32
# Input is:
QHK:=Image(epi,H);
# Expected output:
Group([ f1, f1 ])
# But found:
Group([ <identity> of ..., f1 ])
########

or

########> Diff in /circa/scratch/gap-jenkins/workspace/GAP-master-test/GAPCOPT\
S/64build/GAPTARGET/packages/label/kovacs/GAP-master-snapshot/pkg/wedderga-4.9\
.0/tst/wedderga02.tst:136
# Input is:
List(chi4,x->SimpleAlgebraByCharacterInfo(QG,x));
# Expected output:
[ [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ], [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ]\
, 
  [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 4 ] ], [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 4 ] ]\
 ]

# But found:
[ [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ], [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ]
    , [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ], 
  [ 2, NF(8,[ 1, 3 ]), 8, [ 2, 3, 0 ] ] ]
########

[olexandr-konovalov]

Consider extending Jenkins tests to run them with other sets of packages loaded.

[olexandr-konovalov]

Tests are in a good state now.