gapi: Split out graph generation into a proper graph API

This is a monster patch that splits out the yaml and puppet based graph
generation and pushes them behind a common API. In addition alternate
pluggable GAPI's can be easily added! The important side benefit is that
you can now write a custom GAPI for embedding mgmt!

This also includes some slight clean ups that I didn't find it worth
splitting into separate patches.

test/omv/pkg1a.yaml

@@ -32,7 +32,7 @@
   - iptables -F
   - cd /vagrant/mgmt/ && make path
   - cd /vagrant/mgmt/ && make deps && make build && cp mgmt ~/bin/
-  - cd && mgmt run --file /vagrant/mgmt/examples/pkg1.yaml --converged-timeout=5
+  - cd && mgmt run --yaml /vagrant/mgmt/examples/pkg1.yaml --converged-timeout=5
 :namespace: omv
 :count: 0
 :username: ''

test/omv/pkg1b.yaml

@@ -33,7 +33,7 @@
   - iptables -F
   - cd /vagrant/mgmt/ && make path
   - cd /vagrant/mgmt/ && make deps && make build && cp mgmt ~/bin/
-  - cd && mgmt run --file /vagrant/mgmt/examples/pkg1.yaml --converged-timeout=5
+  - cd && mgmt run --yaml /vagrant/mgmt/examples/pkg1.yaml --converged-timeout=5
 :namespace: omv
 :count: 0
 :username: ''

test/shell/t2.sh

@@ -7,7 +7,7 @@ if env | grep -q -e '^TRAVIS=true$'; then
 fi
 
 # run till completion
-timeout --kill-after=15s 10s ./mgmt run --file t2.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=15s 10s ./mgmt run --yaml t2.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid=$!
 wait $pid	# get exit status
 e=$?

test/shell/t3.sh

@@ -10,11 +10,11 @@ fi
 mkdir -p "${MGMT_TMPDIR}"mgmt{A..C}
 
 # run till completion
-timeout --kill-after=15s 10s ./mgmt run --file t3-a.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=15s 10s ./mgmt run --yaml t3-a.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid1=$!
-timeout --kill-after=15s 10s ./mgmt run --file t3-b.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=15s 10s ./mgmt run --yaml t3-b.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid2=$!
-timeout --kill-after=15s 10s ./mgmt run --file t3-c.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=15s 10s ./mgmt run --yaml t3-c.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid3=$!
 
 wait $pid1	# get exit status

test/shell/t4.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 # should take slightly more than 25s, but fail if we take 35s)
-timeout --kill-after=35s 30s ./mgmt run --file t4.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=35s 30s ./mgmt run --yaml t4.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid=$!
 wait $pid	# get exit status
 exit $?

test/shell/t5.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 # should take slightly more than 35s, but fail if we take 45s)
-timeout --kill-after=45s 40s ./mgmt run --file t5.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=45s 40s ./mgmt run --yaml t5.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid=$!
 wait $pid	# get exit status
 exit $?

test/shell/t6.sh

@@ -7,7 +7,7 @@ if env | grep -q -e '^TRAVIS=true$'; then
 fi
 
 # run till completion
-timeout --kill-after=20s 15s ./mgmt run --file t6.yaml --no-watch --tmp-prefix &
+timeout --kill-after=20s 15s ./mgmt run --yaml t6.yaml --no-watch --tmp-prefix &
 pid=$!
 sleep 1s	# let it converge
 test -e /tmp/mgmt/f1