Improve python debugger client. (#2441)

Replace DisplayData to DebuggerAction. The new class has only four type
options. Furthermore several functions returning with DisplayData is
changed to return with string.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/debugger/do_backtrace.expected

@@ -15,15 +15,15 @@ Stopped at tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
 (jerry-debugger) s
 Stopped at tests/debugger/do_backtrace.js:23 (in foo() at line:21, col:1)
 (jerry-debugger) bt 1 2 t
+Total number of frames: 3
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
-Getting 1 frames. There are 3 in total.
 (jerry-debugger) bt 1 2
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
 (jerry-debugger) bt 0 3 t
+Total number of frames: 3
 Frame 0: tests/debugger/do_backtrace.js:23 (in foo() at line:21, col:1)
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
 Frame 2: tests/debugger/do_backtrace.js:40
-Getting the first 3 frames out of 3.
 (jerry-debugger) bt
 Frame 0: tests/debugger/do_backtrace.js:23 (in foo() at line:21, col:1)
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
@@ -32,9 +32,9 @@ Frame 2: tests/debugger/do_backtrace.js:40
 Frame 0: tests/debugger/do_backtrace.js:23 (in foo() at line:21, col:1)
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
 (jerry-debugger) bt 2 t
+Total number of frames: 3
 Frame 0: tests/debugger/do_backtrace.js:23 (in foo() at line:21, col:1)
 Frame 1: tests/debugger/do_backtrace.js:33 (in test() at line:30, col:1)
-Getting the first 2 frames out of 3.
 (jerry-debugger) n
 out: function foo
 Stopped at tests/debugger/do_backtrace.js:24 (in foo() at line:21, col:1)

tests/debugger/do_break.expected

@@ -18,6 +18,7 @@ out: break test
 out: var cat
 Stopped at breakpoint:1 tests/debugger/do_break.js:51
 (jerry-debugger) delete 1
+Breakpoint 1 deleted
 (jerry-debugger) list
 === Active breakpoints  ===
  2: tests/debugger/do_break.js:36 (in test() at line:20, col:1)

tests/debugger/do_delete.expected

@@ -7,7 +7,7 @@ Stopped at tests/debugger/do_delete.js:17
 Breakpoint 1 at tests/debugger/do_delete.js:17
 (jerry-debugger) b do_delete.js:21
 No breakpoint found, do you want to add a pending breakpoint? (y or [n])
-Pending breakpoint at do_delete.js:21
+Pending breakpoint 2 at do_delete.js:21
 (jerry-debugger) b do_delete.js:19
 Breakpoint 3 at tests/debugger/do_delete.js:19
 (jerry-debugger) b do_delete.js:18
@@ -20,7 +20,9 @@ Breakpoint 4 at tests/debugger/do_delete.js:18
 === Pending breakpoints ===
  2: do_delete.js:21 (pending)
 (jerry-debugger) delete 2
+Pending breakpoint 2 deleted
 (jerry-debugger) delete 3
+Breakpoint 3 deleted
 (jerry-debugger) list
 === Active breakpoints  ===
  1: tests/debugger/do_delete.js:17

tests/debugger/do_delete_all.expected

@@ -8,10 +8,10 @@ Breakpoint 2 at tests/debugger/do_delete_all.js:18
 Breakpoint 3 at tests/debugger/do_delete_all.js:21 (in delete_test() at line:20, col:1)
 (jerry-debugger) b do_delete_all:350
 No breakpoint found, do you want to add a pending breakpoint? (y or [n])
-Pending breakpoint at do_delete_all:350
+Pending breakpoint 4 at do_delete_all:350
 (jerry-debugger) b do_delete_all:37
 No breakpoint found, do you want to add a pending breakpoint? (y or [n])
-Pending breakpoint at do_delete_all:37
+Pending breakpoint 5 at do_delete_all:37
 (jerry-debugger) list
 === Active breakpoints  ===
  1: tests/debugger/do_delete_all.js:17

tests/debugger/do_pending_breakpoints.expected

@@ -2,10 +2,10 @@ Connecting to: localhost:5001
 Stopped at tests/debugger/do_pending_breakpoints.js:15
 (jerry-debugger) break :1
 No breakpoint found, do you want to add a pending breakpoint? (y or [n])
-Pending breakpoint at :1
+Pending breakpoint 1 at :1
 (jerry-debugger) break f
 No breakpoint found, do you want to add a pending breakpoint? (y or [n])
-Pending breakpoint at f()
+Pending breakpoint 2 at f()
 (jerry-debugger) list
 === Pending breakpoints ===
  1: :1 (pending)