IMPALA-11716: Bump up gcovr version to 4.2

IMPALA-9999 upgrades to GCC version to 10.4 which generates new gcov
format that the current gcovr version (3.4) can't parse. This patch
upgrades gcovr to the latest Python2-compatible version (4.2). Also adds
Jinja2, MarkupSafe and lxml as the required dependent packages. The
development packages of libxml2 and libxslt are also added in
bootstrap_system.sh and bootstrap_build.sh.

This patch also fixes a failure due to the gcov executable not found in
PATH.

Tests:
 - Verified builds on Ubuntu 16.04 and CentOS 7.9
 - Verified coverage_helper.sh work after this patch

Change-Id: I9458fa0dc97d69f88a4e8a3313dc9440215dfd52
Reviewed-on: http://gerrit.cloudera.org:8080/19226
Reviewed-by: Michael Smith <michael.smith@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

bin/bootstrap_build.sh

@@ -35,7 +35,7 @@ export DEBIAN_FRONTEND=noninteractive
 sudo -E apt-get update
 sudo -E apt-get --yes install g++ gcc git libsasl2-dev libssl-dev make python-dev \
      python-setuptools python3-dev python3-setuptools libffi-dev libkrb5-dev \
-     krb5-admin-server krb5-kdc krb5-user
+     krb5-admin-server krb5-kdc krb5-user libxml2-dev libxslt-dev
 
 source /etc/lsb-release
 

bin/bootstrap_system.sh

@@ -220,7 +220,7 @@ ubuntu apt-get --yes install ccache curl gawk g++ gcc apt-utils git libffi-dev \
         libsasl2-modules libsasl2-modules-gssapi-mit libssl-dev make ninja-build \
         python-dev python-setuptools python3-dev python3-setuptools postgresql \
         ssh wget vim-common psmisc lsof openjdk-8-jdk openjdk-8-source openjdk-8-dbg \
-        net-tools language-pack-en
+        net-tools language-pack-en libxml2-dev libxslt-dev
 # Required by Kudu in the minicluster
 ubuntu20 apt-get --yes install libtinfo5
 ARCH_NAME=$(uname -p)
@@ -268,7 +268,7 @@ redhat sudo yum install -y curl gawk gcc gcc-c++ git krb5-devel krb5-server \
         wget vim-common nscd cmake fuse-devel zlib-devel \
         psmisc lsof openssh-server redhat-lsb java-1.8.0-openjdk-devel \
         java-1.8.0-openjdk-src python3-devel python3-setuptools net-tools \
-        langpacks-en glibc-langpack-en
+        langpacks-en glibc-langpack-en libxml2-devel libxslt-devel
 
 # Enable the Powertools repo for snappy-devel on RedHat 8
 redhat8 sudo yum install -y dnf-plugins-core

bin/coverage_helper.sh

@@ -66,6 +66,10 @@ fi
 if [ ${REPORT_ACTION} -eq 1 ]; then
   mkdir -p "${REPORT_DIRECTORY}"
   rm -f "${REPORT_DIRECTORY}"/index*.html
+  if ! which gcov > /dev/null; then
+    export PATH="$PATH:$IMPALA_TOOLCHAIN_PACKAGES_HOME/gcc-$IMPALA_GCC_VERSION/bin"
+  fi
+  echo "Using gcov at `which gcov`"
   # src/util/bit-packing.inline.h gets lots of hits, so generating a detailed report
   # for it takes several minutes. Exclude it to keep the execution time down.
   # gcovr excludes are buggy, so on some environments these excludes won't work.

infra/python/deps/requirements.txt

@@ -37,7 +37,10 @@ flake8 == 3.9.2
     contextlib2 == 0.6.0
     pathlib2 == 2.3.7.post1
     zipp == 1.2.0
-gcovr == 3.4
+gcovr == 4.2
+  Jinja2 == 2.11.3
+    MarkupSafe == 1.1.1
+  lxml == 4.9.1
 hdfs == 2.0.2
   docopt == 0.6.2
   execnet == 1.4.0