ci+docs: CentOS renamed the PowerTools repo to lowercase

Change-Id: I4b78986f3af17d2124824992e31b408ebe8de03a

.jenkins.d/00-deps.sh

@@ -34,7 +34,7 @@ elif has Ubuntu $NODE_LABELS; then
     fi
 
 elif has CentOS-8 $NODE_LABELS; then
-    sudo dnf config-manager --enable PowerTools
+    sudo dnf config-manager --enable powertools
     sudo dnf -y install gcc-c++ libasan pkgconf-pkg-config python3 \
                         boost-devel openssl-devel sqlite-devel \
                         libpcap-devel systemd-devel

docs/INSTALL.rst

@@ -107,7 +107,7 @@ On Linux, NFD needs the following dependencies to enable optional features:
 
   .. code-block:: sh
 
-    sudo dnf config-manager --enable PowerTools  # on CentOS only
+    sudo dnf config-manager --enable powertools  # on CentOS only
     sudo dnf install libpcap-devel systemd-devel
 
 Build

tests/other/cs-benchmark.cpp

@@ -26,8 +26,6 @@
 #include "benchmark-helpers.hpp"
 #include "table/cs.hpp"
 
-#include <ndn-cxx/security/signature-sha256-with-rsa.hpp>
-
 #include <iostream>
 
 #ifdef HAVE_VALGRIND