ci: configure flux --with-pmix-bootstrap in bionic image

Problem: need to test --enable-pmix-bootstrap in CI and obtain
code coverage report for related code.

Add --enable-pmix-bootstrap to bionic/coverage in the CI build
matrix generator.

Add openpmix and prrte to bionic docker image:
 - prrte: export a recent commit from the prrte git repo, since the most
   recent release (1.0.0) doesn't include prterun, which is needed by
   our pmix sharness test.
 - openpmix: export a recent git commit from the openpmix git repo,
   needed to compile prrte above as it won't work with openpmix-3.2.3.
 - add build requirements of flex and libevent-dev
 - add prrte runtime requirement of ssh

src/test/docker/bionic/Dockerfile

@@ -16,6 +16,8 @@ RUN apt-get update \
         wget \
         man \
         git \
+        flex \
+        ssh \
         sudo \
         vim \
         luarocks \
@@ -82,6 +84,7 @@ RUN apt-get update \
         libhwloc-dev \
         libmpich-dev \
         libs3-dev \
+        libevent-dev \
  && rm -rf /var/lib/apt/lists/*
 
 # Testing utils and libs
@@ -113,4 +116,24 @@ RUN mkdir caliper \
  && cd ../.. \
  && rm -rf caliper
 
+# Install openpmix, prrte
+RUN mkdir prrte \
+ && cd prrte \
+ && git clone https://github.com/openpmix/openpmix.git \
+ && git clone https://github.com/openpmix/prrte.git \
+ && ls -l \
+ && set -x \
+ && cd openpmix \
+ && git checkout fefaed568f33bf86f28afb6e45237f1ec5e4de93 \
+ && ./autogen.pl \
+ && ./configure --prefix=/usr --disable-static && make -j 4 install \
+ && ldconfig \
+ && cd .. \
+ && cd prrte \
+ && git checkout 477894f4720d822b15cab56eee7665107832921c \
+ && ./autogen.pl \
+ && ./configure --prefix=/usr && make -j 4 install \
+ && cd ../.. \
+ && rm -rf prrte
+
 ENV LANG=C.UTF-8

src/test/generate-matrix.py

@@ -151,7 +151,7 @@ def __str__(self):
         CXX="g++8",
         DISTCHECK="t",
     ),
-    args="--with-flux-security --enable-caliper",
+    args="--with-flux-security --enable-caliper --enable-pmix-bootstrap",
     test_s3=True,
 )
 
@@ -169,7 +169,7 @@ def __str__(self):
 )
 
 # Ubuntu: coverage
-matrix.add_build(name="coverage", coverage=True, jobs=2)
+matrix.add_build(name="coverage", coverage=True, jobs=2, args="--enable-pmix-bootstrap")
 
 # Ubuntu: TEST_INSTALL
 matrix.add_build(