remove wreck, jsc

The wreck exec system is worthless, remove it along with associated
commands, tests, and support code.

Since libjsc doesn't work without wreck, it is removed as well.

Fixes flux-framework#1984

Closes flux-framework#1947
Closes flux-framework#1618
Closes flux-framework#1595
Closes flux-framework#1593
Closes flux-framework#1534
Closes flux-framework#1468
Closes flux-framework#1443
Closes flux-framework#1438
Closes flux-framework#1419
Closes flux-framework#1410
Closes flux-framework#1407
Closes flux-framework#1393
Closes flux-framework#915
Closes flux-framework#894
Closes flux-framework#866
Closes flux-framework#833
Closes flux-framework#774
Closes flux-framework#772
Closes flux-framework#335
Closes flux-framework#249

README.md

@@ -139,8 +139,6 @@ Common commands from flux-core:
    start              bootstrap a local Flux instance
    submit             submit job requests to a scheduler
    user               Flux user database client
-   wreck              Flux wreck convenience utilities
-   wreckrun           Flux utility for remote execution
 ```
 
 Most of these have UNIX manual pages as `flux-<sub-command>(1)`,

configure.ac

@@ -394,7 +394,6 @@ AC_CONFIG_FILES( \
   src/common/libflux/version.h \
   src/common/libkvs/Makefile \
   src/common/libkz/Makefile \
-  src/common/libjsc/Makefile \
   src/common/libjob/Makefile \
   src/common/libzio/Makefile \
   src/common/libsubprocess/Makefile \
@@ -422,7 +421,6 @@ AC_CONFIG_FILES( \
   src/modules/kvs-watch/Makefile \
   src/modules/content-sqlite/Makefile \
   src/modules/barrier/Makefile \
-  src/modules/wreck/Makefile \
   src/modules/cron/Makefile \
   src/modules/aggregator/Makefile \
   src/modules/pymod/Makefile \

doc/man1/Makefile.am

@@ -8,9 +8,6 @@ MAN1_FILES_PRIMARY = \
 	flux-keygen.1 \
 	flux-logger.1 \
 	flux-ping.1 \
-	flux-submit.1 \
-	flux-wreckrun.1 \
-	flux-wreck.1 \
 	flux-start.1 \
 	flux-module.1 \
 	flux-exec.1 \
@@ -60,8 +57,6 @@ stderr_devnull_0 = 2>/dev/null
 EXTRA_DIST = \
 	$(ADOC_FILES) \
 	COPYRIGHT.adoc \
-	NODESET.adoc \
-	wreck-options.adoc \
-	wreck-extra-options.adoc
+	NODESET.adoc
 
 CLEANFILES = $(MAN1_FILES) $(XML_FILES)

doc/man1/flux-start.adoc

@@ -83,12 +83,6 @@ shell as the initial program:
 
   srun --pty -N8 flux start
 
-Launch an 8-way Flux instance under Flux, with /bin/true as
-the initial program:
-
-  flux wreckrun -N8 flux start /bin/true
-
-
 AUTHOR
 ------
 This page is maintained by the Flux community.