Drop peakmem_tracker service

When devstack reverted the pip cap in [0], it was necessary to disable
the peakmem_tracker service as there was no easy way to make it work in
that setup. So we need to delete it from the test-matrix here, too.

We could decide to add it only for older stable/branches, but as ds-gate
is to be obsoleted anyway, I'm not convinced that that is worth the
effort.

[0] https://review.opendev.org/561597

Change-Id: I9dd57d3bdb56c64377efbdd55429bd075223c746

roles/test-matrix/files/features.yaml

@@ -77,7 +77,7 @@ branches:
 primary:
   default:
     base:
-      services: [mysql, rabbit, dstat, peakmem_tracker, etcd3]
+      services: [mysql, rabbit, dstat, etcd3]
 
   ceilometer:
     base:
@@ -228,7 +228,7 @@ primary:
 subnode:
   default:
     base:
-      services: [dstat, peakmem_tracker]
+      services: [dstat]
 
   ceilometer:
     base:

test-features.sh

@@ -16,15 +16,15 @@
 
 ERRORS=0
 
-TEMPEST_FULL_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,peakmem_tracker,etcd3,tempest,placement-api"
+TEMPEST_FULL_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,etcd3,tempest,placement-api"
 
-TEMPEST_NEUTRON_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,peakmem_tracker,etcd3,tempest,q-svc,q-agt,q-dhcp,q-l3,q-meta,q-metering,placement-api"
+TEMPEST_NEUTRON_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,etcd3,tempest,q-svc,q-agt,q-dhcp,q-l3,q-meta,q-metering,placement-api"
 
-TEMPEST_HEAT_SLOW_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,peakmem_tracker,etcd3,tempest,q-svc,q-agt,q-dhcp,q-l3,q-meta,q-metering,placement-api"
+TEMPEST_HEAT_SLOW_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,c-bak,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,etcd3,tempest,q-svc,q-agt,q-dhcp,q-l3,q-meta,q-metering,placement-api"
 
-GRENADE_NEW_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,peakmem_tracker,tempest,placement-api"
+GRENADE_NEW_MASTER="n-api,n-api-meta,n-cpu,n-sch,n-cond,n-novnc,g-api,g-reg,key,c-api,c-vol,c-sch,s-proxy,s-account,s-container,s-object,mysql,rabbit,dstat,tempest,placement-api"
 
-GRENADE_SUBNODE_MASTER="n-api-meta,n-cpu,g-api,c-vol,dstat,peakmem_tracker,placement-client"
+GRENADE_SUBNODE_MASTER="n-api-meta,n-cpu,g-api,c-vol,dstat,placement-client"
 
 # Utility function for tests
 function assert_list_equal {