tests: don't use hard coded value for glusterd workdir

A number of test referred to /var/lib/glusterd,
they were adjusted to use "$GLUSTERD_WORKDIR".

(This has significance for proper test runs on non-Linux
platforms -- see the following #define in glusterfs.h:

  #ifdef GF_LINUX_HOST_OS
  #define GLUSTERD_DEFAULT_WORKDIR DATADIR "/lib/glusterd"
  #else
  #define GLUSTERD_DEFAULT_WORKDIR DATADIR "/db/glusterd"
  #endif

Ie. the glusterd workdir will typically be /var/db/glusterd
instead of /var/lib/glusterd on non-Linux platforms.)

BUG: 1476957
Change-Id: I69ce3e1bb7a0c14ea85b60adbf8205f9aca46cd5
Signed-off-by: Csaba Henk <csaba@redhat.com>
Reviewed-on: https://review.gluster.org/17937
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Tested-by: Amar Tumballi <amarts@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>

tests/basic/mount-nfs-auth.t

@@ -41,7 +41,7 @@ function build_dirs () {
 }
 
 function export_allow_this_host_ipv6 () {
-        printf "$EXPORT_ALLOW6\n" > /var/lib/glusterd/nfs/exports
+        printf "$EXPORT_ALLOW6\n" > "$GLUSTERD_WORKDIR"/nfs/exports
 }
 
 function export_allow_this_host () {

tests/basic/peer-parsing.t

@@ -2,7 +2,7 @@
 
 . $(dirname $0)/../include.rc
 
-PEER_DIR=/var/lib/glusterd/peers
+PEER_DIR="$GLUSTERD_WORKDIR"/peers
 TEST mkdir -p $PEER_DIR
 
 declare -i HOST_NUM=100

tests/bugs/cli/bug-1320388.t

@@ -19,7 +19,7 @@ SSL_CA=$SSL_BASE/glusterfs.ca
 
 cleanup;
 rm -f $SSL_BASE/glusterfs.*
-touch /var/lib/glusterd/secure-access
+touch "$GLUSTERD_WORKDIR"/secure-access
 
 TEST openssl genrsa -out $SSL_KEY 1024
 TEST openssl req -new -x509 -key $SSL_KEY -subj /CN=Anyone -out $SSL_CERT