Finish strict repo priority support

- add flag to bindings
- support flag/ruletype in testcases
- support strict repo prio problems in solution generation
- implement automatic disabling of strict repo rules due to install jobs
- add a testcase

test/testcases/strictrepoprio/strictrepoprio.t

@@ -0,0 +1,22 @@
+repo system 0 empty
+repo available 0 testtags <inline>
+#>=Pkg: A 2 1 noarch
+repo available 1 testtags <inline>
+#>=Pkg: A 1 1 noarch
+#>=Req: B
+system i686 rpm system
+
+solverflags strictrepopriority
+job install name A
+result transaction,problems <inline>
+#>problem 30c1639e info nothing provides B needed by A-1-1.noarch
+#>problem 30c1639e solution 23f73f5b deljob install name A
+#>problem 30c1639e solution 5dd1416b allow A-2-1.noarch@available
+
+nextjob
+
+solverflags strictrepopriority
+job install pkg A-2-1.noarch@available
+result transaction,problems <inline>
+#>install A-2-1.noarch@available
+