Switch tests to use TestDirectory

And make tests that depend on randomness more reproducible.
============================OUTPUT START==============================

#I  You may wish to install the xgap package
#I  and enjoy the graphic capabilities of SONATA.
#I  RunPackageTests("wedderga", "4.7.3", "tst/testall.g", auto);
 ���������������������������   GAP 4.8.8, 20-Aug-2017, build of 2017-08-20 19:40:04 (BST)
 ���  GAP  ���   https://www.gap-system.org
 ���������������������������   Architecture: x86_64-pc-linux-gnu-gcc-default64
 Libs used:  gmp, readline
 Loaded workspace: wsp.g
 Components: trans 1.0, prim 2.1, small* 1.0, id* 1.0
 Packages:   AClib 1.2, Alnuth 3.0.0, AtlasRep 1.5.1, AutPGrp 1.8, 
             Browse 1.8.7, CRISP 1.4.4, Cryst 4.1.12, CrystCat 1.1.6, 
             CTblLib 1.2.2, FactInt 1.5.4, FGA 1.3.1, GAPDoc 1.6, GUAVA 3.13, 
             IO 4.4.6, IRREDSOL 1.4, LAGUNA 3.7.0, Polenta 1.3.7, 
             Polycyclic 2.11, RadiRoot 2.7, ResClasses 4.6.0, SONATA 2.8, 
             Sophus 1.23, SpinSym 1.5, TomLib 1.2.6, Utils 0.46, 
             Wedderga 4.7.3
 Try '??help' for help. See also '?copyright', '?cite' and '?authors'
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
1.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
2.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
3.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
4.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
5.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
6.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
7.tst
########> Diff in /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/\
64build/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wed\
derga07.tst, line 9:
# Input is:
WedderburnDecompositionInfo(R);
# Expected output:
[ [ 1, Rationals ], [ 1, Rationals ], [ 1, Rationals ], [ 1, Rationals ], 
  [ 2, Rationals ], [ 1, Rationals, 3, [ 2, 2, 0 ] ], [ 2, CF(3) ], 
  [ 1, Rationals, 6, [ 2, 5, 0 ] ], [ 1, NF(8,[ 1, 7 ]), 8, [ 2, 7, 0 ] ], 
  [ 1, Rationals, 12, [ [ 2, 5, 3 ], [ 2, 7, 0 ] ], [ [ 3 ] ] ] ]
# But found:
[ [ 1, Rationals ], [ 1, Rationals ], [ 1, Rationals ], [ 1, Rationals ], 
  [ 2, Rationals ], [ 1, Rationals, 3, [ 2, 2, 0 ] ], [ 2, CF(3) ], 
  [ 1, Rationals, 6, [ 2, 5, 0 ] ], [ 1, NF(8,[ 1, 7 ]), 8, [ 2, 7, 0 ] ], 
  [ 1, Rationals, 12, [ [ 2, 5, 9 ], [ 2, 7, 0 ] ], [ [ 9 ] ] ] ]
########
########> Diff in /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/\
64build/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wed\
derga07.tst, line 332:
# Input is:
A:=W[12];
# Expected output:
[ 1, NF(8,[ 1, 7 ]), 24, [ [ 2, 7, 12 ], [ 2, 17, 9 ] ], [ [ 3 ] ] ]
# But found:
[ 1, NF(8,[ 1, 7 ]), 24, [ [ 2, 7, 12 ], [ 2, 17, 3 ] ], [ [ 9 ] ] ]
########
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/wedderga0\
8.tst
#I  Testing /data/gap-jenkins/workspace/GAP-minor-release-test/GAPCOPTS/64buil\
d/GAPGMP/gmp/GAPTARGET/packages/label/kovacs/gap4r8/pkg/wedderga/tst/bugfix.ts\
t
#I  Errors detected while testing package wedderga
#I  RunPackageTests("wedderga", "4.7.3", "tst/testall.g", auto): runtime 67573
============================OUTPUT END================================
gap-packages / wedderga

Switch tests to use TestDirectory #7
